Beta-Test your way to MWC!

As you may have seen already, we have some extra tickets for Mobile World Congress in Barcelona and we are looking for someone to claim them!

Some of these tickets we’re giving away to three people who give us the best reason for why they should go (via Twitter or Facebook, as explained in this Ticket-Giveaway post).

However, we have also reserved one ticket for a current beta-tester that gives us the best feedback for any of our apps (OpenSignal, WeatherSignal, or CrisisSignal). Here’s how to enter:

  • Send me an email (at with your feedback and include #MWCbeta in the subject
  • Write answers to the following three questions:
    1. Why did you download the app?
    2. What do you think works well in the app?
    3. What would you change about the app and do you know of a good way to do it?

We’ll announce the winner on February 18th! Please note that this is a giveaway for the MWC ticket only; flights and accommodation are not included.

Hope to see you at Fira Gran Via!

Fira Gran Via, venue for MWC 2015

Fira Gran Via, venue for Mobile World Congress 2015

Posted in Android Beta-Testing, Beta-Testing, Competition, iOS Beta-Testing, Mobile World Congress | Leave a comment

MWC Ticket giveaway 2015

**Update as of 23 February 2015** We have one more ticket available for MWC! Follow the instructions below to place your bid for the ticket. The winner will be announced tomorrow at noon.

At the end of February the OpenSignal team will be heading to Barcelona to attend MWC, the biggest event in the mobile industry calendar. As with previous years we have several tickets to give away – three in total this year (worth €700 each) – so if you want to spend the first week of March learning about what to look forward to this coming mobile year (as well as checking out the OpenSignal booth) then enter our competition to win a ticket to Mobile World Congress! It’s very easy: 1) Follow us on twitter and tweet us the reason why you should be the one to go. Or 2) Like us on Facebook and post the reason you should go on our wall in under 40 words. On Wednesday the 18th of February we’ll announce the winners over Twitter and Facebook, and send the them the code they need to claim their ticket. Just to be clear: this competition is for three tickets to Mobile World Congress only, participants are required to make their own way to Barcelona and sort out their own accommodation.

The OpenSignal Team at MWC

Come hang out with these cool guys!


Posted in Competition, Mobile World Congress | Tagged , , , , , | 2 Comments

Mobile World Congress – Fiesta!

Going to MWC 2015? We’ll see you there! Come by our booth in the UKTI Innovation Pavilion, or meet us at one of the MWC parties and events we’ll all be attending!

Speaking of parties – what/where/when/who? Here is OpenSignal’s resourceful map and calendar of the parties in Barcelona during MWC. Enjoy!

For the map: Number in marker indicates day of event (e.g. 1 = 1 March 2015); Green – Free; Blue – Pay to Attend; Red – Invite Only;
Click here to see the map in your browser.

Now, the calendar view:

Friday, 27 February 2015

Imagine Express Hacktrain Departs
“Imagine Express is a program aimed to generate businesses in the Mobile sector. Imagine Express will take place during a 4-day trip by train that will travel from Barcelona-Paris-London.”
Time: TBD
Where: Mobile World Center, Barcelona
Registration: Free – Applications close 16th February

Sunday, 1 March 2015

Innovation on the Fringe
“The fourth annual Innovation on the Fringe event is happening on Sunday 1st March 2015. See the latest apps and services from your peers, chat about the challenges of running a mobile app or service and network with like-minded mobilists and enthusiasts.”
Time: 14:30- onwards (Festival lasts until 6 March)
Where: Talent Garden Barcelona, Carrer de Mutaner 239
Registration: Tickets @ €5

“Meet the press at the eighth-annual edition of ShowStoppers @ Mobile World Congress, the one event where the wireless industry, mobile leaders, innovators, award winners, visionaries, startups, upstarts and studios make new connections, promote brand, take leadership and open new business markets.”
Time: 16:00-19:00
Where: TBD
Registration: Invite Only

Mobile Sunday
“Mobile Sunday is where the stories that matter are launched the day before the conference starts. Connect with C-level industry leaders, influencers, creators, developers, investors, press & media and entrepreneurs working in mobile, wearables and the Internet of Things in a relaxed social networking environment before the hectic week begins!”
Time: 18:00-22:30
Where: Antigua Fabrica Estrella Damm
Registration: Tickets @ €20

Innovative Spanish Tapas and Cocktails with 2 Michelin Chefs
“We are two chefs with years of experience in Michelin restaurants who preferred to step out of the kitchen and share with our guests our story, inspirations and attention. The menu will consist of surprise signature tapas from traditional catalan cuisine, paired with famous regional wines.”
Time: 18:00-21:00
Where: The Hidden Factory, Carrer de Joaquín Costa 24.
Registration: €25

Monday, 2 March 2015

Next Executive Expedition
“In 2015 we will continue to deepen the dialogue about the key topics of the Digital Transformation. From March 2-4, we will travel to Barcelona with a group of CDOs and CMOS to join the Mobile World Congress.”
Time: TBD, Until 4th March
Where: Hotel Vincci Bit, Carrer de Josep Pla, 69
Registration: Separate Event Registration

10th Annual Ladies Lunch Barcelona
“Part of the Heroes of the Mobile Fringe Festival the Annual Ladies Lunch is a chance for us ladies to get together for an hour or so over a relaxed lunch.”
Time: 12:30
Where: Caravela Gourmet
Registration: Tickets @ ~€30

4YFN – Disrupted by Mobile
“4 Years From Now is an international programme presented by Mobile World Capital Barcelona and GSMA that brings together the best mobile start-ups and entrepreneurs with investors, accelerators, incubators and corporations from the mobile ecosystem.”
Time: 10:00, goes until 4 March
Where: Hall 8, Fira Montjuïc
Registration: Free to MWC Attendees

MEF Connects
“MEF Connects MWC 2015 also supported by TIMWE and Viacom International Media Networks, returns to the prestigious Museu d’Art Contemporani de Barcelona (MACBA) to bring together over 650 international members and guests representing the global mobile ecosystem.”
Time: 20:00 onwards
Where: Museu d’Art Contemporani de Barcelona
Registration: Invite Only, Waitlist for Non-Members Available

Hot Topics – European Leaders
“Hot Topics hosts this must attend, invitation-only event for its 5th successive year! With the world’s mobile influencers, investors, entrepreneurs and game changers, all in one room, this is the one event you need to be at.”
Time: 19:00-22:00
Where: Hotel Omm Barcelona, 265 Carrer del Rosselló
Registration: Invite Only, Register Interest

Mobile Premier Awards
“The MPA 9th edition in Barcelona on 2 March 2015 will feature 16 of the most innovative Apps from all over the world pitching live on stage. The lucky 16 finalists have been selected among winners of the final season of Appcircus competitions and Appcircus challenges.”
Time: 17:30-22:00
Where: Sala Apolo, Nou de la Rambla 113
Registration: Tickets @ $10

IoT Stars
“IoT Stars is a startup pitching event for Internet of Things startups during the Mobile World Congress 2015 in Barcelona. 10 startups will be pitching in front of a top-notch jury at the emblematic Agbar Tower.”
Time: 18:00-22:00
Where: Agbar Tower
Registration: €25 Early Bird, €35 Standard

Imagine Express Hacktrain Pitch Event
“Imagine Express will take place during a 4-day trip by train that will travel from Barcelona-Paris-London. On arrival to Barcelona these teams will pitch their project at the Barcelona Mobile World Congress.”
Time: TBD
Where: TBD
Registration: Free – Applications close 16th February

Verto Data and Tapas
“Start the MWC week by meeting the thought leaders of the digital ecosystem at our exclusive invitation-only cocktail event!”
Time: 17:00-20:00
Where: Doble @ L’Eggs, 116 Passeig de Gràcia
Registration: Free

Mobile Marketing Party
“Join us for the second annual Mobile World Congress Mobile Marketing Party. Presented by the Application Developers Alliance.”
Time: 20:00-00:00
Where: Restaurante Marmalade, 4-6 Carrer de la Riera Alta
Registration: €20

Tuesday, 3 March 2015

The MMIX – Official Mobile World Congress Party
“The Official Mobile World Congress 2015 Party features platinum selling Rudimental headlining with a DJ set, as well as International DJ and Dance star Roger Sanchez, both supported by Edu Natored and Ollie Humphreys.”
Time: 20:30-Late
Where: Italian Pavilion, Fira Montjuïc
Registration: €66

Mobile Marketing Mixer
“Look no further than the Mobile Marketing Mixer, which will be hosted at the spectacular Cerveceria Moritz, a unique building, transformed from the old Moritz beer factory into one of Barcelona’s coolest venues.”
Time: 20:00-00:00
Where: Fàbrica Moritz, Ronda de Sant Antoni, 39
Registration: Free (Event password is MobileMixer2015) – Register

GSMA Global Mobile Awards
“First presented at (what was then) the GSM World Congress in Cannes in 1996, the awards have grown and evolved alongside the industry and phenomenal growth of global markets to reflect the positive impact of mobile on all walks of life.”
Time: 18:00-22:00
Where: Fira Gran Via, Barcelona, Hall 4 Conference Village, Auditorium 1
Registration: Free for MWC attendees

Women in Mobile
“This event is the perfect opportunity to learn from some of these leaders and listen to their mobile success stories. Our speaker lineup is 100% female but our male colleagues are more than welcome to attend and contribute.”
Time: 19:30-21:00
Where: MauMau, Fontrodona 35
Registration: Free

We ♥ Mobile
“Be part of the first “WE ♥ MOBILE” party presented by LOVOO and adjust. During the MWC15 we’ll have a unforgettable night in the centre of Barcelona.”
Time: 20:00-Late
Where: Shôko Club, 36 Passeig Marítim Barceloneta
Registration: Request Invitation Code

TechCrunch Barcelona Mini-Meetup and Pitch Off
“Participants interested in competing in the pitch-off will have 60 seconds to explain why their startup is awesome. These products must currently be in stealth or private beta. Applications open.”
Time: 19:00-22:00, Pitch Off @ 20:00
Where: Ailaic, Passatge Utset 14,
Registration: Open to All, Cost: €5.50

Inneractive’s Casino Royale Theme Party
“Inneractive is hosting the party of all parties. Join us for a Casino Royale theme party! Win prizes at the roulette and blackjack tables, enjoy tapas and exotic drinks and meet fabulous people in a night of class and mayhem.”
Time: 20:00-23:00
Where: Restaurante Marmalade, 4-6 Carrer de la Riera Alta
Registration: Free

Mobile Apps Party
“Join us for the {un}official Mobile World Congress Mobile Apps Party, an all-out celebration of all things apps!”
Time: 20:00-00:00
Where: W Hotel, Plaça de la Rosa dels Vents, 1
Registration: €20 (Sold out)

Wednesday, 4 March 2015

Connected Women Mobile Summit
“The Connected Women Summit at Mobile World Congress will explore how the industry can accelerate the female digital economy.”
Time: 8:30-13:30
Where: Fira de Barcelona – Gran Via: CC2 Auditorium, Upper Level, Hall 2
Registration: Free for MWC attendees

Swedish Beers
“It’s that time of year again when we all get together to celebrate all things mobile. And this year is an even bigger celebration as we are celebrating our 10th Swedish Beers party in Barcelona.”
Time: 19:00-02:00
Where: Calle Carme 40
Registration: Free

Airpush Cocktail Party
“Join us this year, along with over 600 of the mobile industry’s most influential players, in one of the best venues in all of Spain.”
Time: 20:00-23:00
Where: SALT Beach Club
Registration: Free for MWC Attendees

Wip Developer Smackdown
“What’s a Smackdown? It’s a live debate and cross-examination between developers on today’s hottest and most important topics. It’s developers talking with other developers to cut to the heart of the matter.”
Time: 16:00-19:00
Where: Fàbrica Moritz, Ronda de Sant Antoni, 39
Registration: Free

WiP Jameoke + Party
“Join us at the historic Fàbrica Moritz Barcelona on the evening of Wednesday, March 4 for the best developer event in Barcelona.”
Time: 19:00-23:00
Where: Fàbrica Moritz, Ronda de Sant Antoni, 39
Registration: Free

WebRTC Meetup Barcelona
“WebRTC is a web standard and movement to bring the power of real-time, peer-to-peer voice, video, and data communications with a few simple JavaScript APIs. This meetup will have speakers from Quobis, Disruptive Analysis, Tokbox and other companies leading in this space.”
Time: 17:00-22:00
Where: Poblenou Campus Auditorium – Universitat Pompeu Fabra (UPF), Roc Boronat, 138
Registration: Free – 40 spots left

Mobile Media Summit
“Mobile Media Summit @ Mobile World Congress will focus on mobile media and advertising global best practices from the top global brands and agencies. With superior keynotes, panels, and case studies, our agenda will combine world class speakers and insights.”
Time: 09:30-16:50
Where: Fira Gran Via, Hall 8
Registration: Separate Event Registration

Thursday, 5 March 2015

Mlove MWC After Party
“A grand finale and a true local experience after a hectic week at Fira!”
Time: 19:00
Where: CLDC Barcelona, Passeig Marítim de la Barceloneta, 32
Registration: Free

Have we missed anything? Would you like to see other things on the map as well? Coverage, maybe? Stay tuned for our next blog post on getting connected in Barcelona – with the latest coverage map and curated list of Wifi hotspots.

See you at MWC!

Posted in Events, Mobile Trends, Mobile World Congress | Leave a comment

Microphones: the potential uses of a common sensor

At OpenSignal we love sensors. We’ve written several blogposts on the different types to be found on Android and iPhone devices and have recently published a comprehensive report on the topic.

But when thinking about sensors, one of the most basic and widespread is often overlooked: the microphone, present in every single cell phone – be it a super slick smartphone or the Samsung X840 I had for many years.

Even my old Samsung X480 had a couple of sensors...

Even my old Samsung X480 had a couple of sensors…

Some well known applications take advantage of this ubiquitous sensing device. On chat and social apps such as WhatsApp, WeChat or iMessage, the mic is put to work to record and share voice messages. The microphone is also used by Apple’s Siri and Google voice search – my husband “OK Google”s his phone at least a couple of times a day, often with questions (“How high is Cusco?”), sometimes with requests (“Show me a picture of a polar bear”). It is likewise thanks to the microphone that Shazam, SoundHound or TrackID™ can take a digital fingerprint of a song you’re listening to, which is then matched against large databases of tracks to give you the title of your tune of choice.

The potential uses of the microphone as a repurposed sensor are in fact multiple, diverse and very promising, as I discovered diving into a bunch of extremely interesting articles and papers. Here are some of the projects, apps and proof of concept software that reinvent the functions of the mobile’s mic.

Mapping noise pollution

I recently came across a wonderful website that any French-speaker map lover should check out: Among their many cool blogposts features an entry on crowdsourced maps to measure noise pollution. Some of these are generated through Android and iPhone apps that employ the cell phone’s microphone to take readings of urban ambient noise. Examples include NoiseWatch, Noisemap, NoiseTube and WideNoise. The literature on the subject is quite extensive as these applications are mostly the work of academics and environmental agencies – have a look at the table at the end if you want to read further!

Into the wild

But it’s not all about urban noise: cell phones also lend an ear to nature’s voice. And if you happen to be planning a visit to the New Forest National Park, you might consider downloading beforehand the Cicada Hunt app, an original piece of software that uses your phone’s mic to capture the sounds of the surrounding environment and let’s you know if there’s a cicada anywhere near you. More info about it can be found in one of our previous blogposts. Another wonderful project that plunges into the woods is Rainforest Connection. Their aim is to fight illegal logging by camouflaging solar-powered cell phones in the tree canopy; when the microphones in these devices catch the sound of chainsaw, the responsible authorities are instantly alerted.

Phone's mic can help save trees

Phone’s mics can help save trees


Health comes first

Smartphones’ microphones could open up an array of possibilities in the field of mHealth. They have been tested as a mean to monitor sleep patterns by listening to your movements – HappyWakeUp does exactly that to rouse you from your dreams at the most convenient stage of the sleep cycle. The microphone can be equally employed to measure social isolation based on the duration of ambient conversations: this is one of the functions of BeWell, an app that keeps track of your general wellbeing focusing on your sleep habits, physical activities and social interactions. The developers of BeWell have also been working on StressSense, a software that uses the microphone to identify stress in the user’s voice. As a matter of fact, cell phones’ mics can listen up not only for stress signs but also for pathological lung sounds, as shown by the creators of SpiroSmart, a smartphone-based spirometer. Last but not least, apps such as BioAid or soundAMP Lite can transform your phone into a hearing aid by amplifying the audio feed from the microphone and playing it back through your headphones.

What was that noise?

Smartphones have the potential to become extremely precise sound sensing devices, as proved by several apps and projects. In 2009, a research team from Dartmouth College published a paper describing SoundSense, an iPhone application designed to recognise and classify sound events detected by the cell phones’s microphone. In a similar fashion, the Batphone app works as a novel method of indoor localisation by recording room ambiance – the little snippets of noise are used to identify rooms previously tagged by the user. What’s more, a study conducted by researchers at Queen Mary University of London has shown that acoustic scene classification algorithms, exploited by applications of this kind, can achieve a mean accuracy matching the median performance of humans. That’s right: phones can be as good as humans at understanding where they are based on noises heard.

Cell phones’ mics will not only process and analyse different kinds of sound: they can also be programmed to produce particular noises for very specific purposes. Sonar, for example, works exactly as its name suggests – emitting sound to calculate the distance of objects from the echo. Another innovative creation is Chirp: this application produces a short bird-like song that triggers a download when “heard” by another phone running the app.

Chirp away your data!

Chirp away your data!


The starting point for new developments

Several of the apps mentioned here are the work of academic research, and as such, not always available on Google Play or Apple Store; but the prospective uses of the microphone as a repurposed sensor are no less exhilarating for this. Even more is to be expected if new hardware and software are combined. We have smartwatches in mind, but also projects such as iBats – an app that uses an ultrasonic detector plugged into the phone to collect bat sounds and map their distribution. Similarly, a team at Cornell University are working on BodyBeat, a sensing system composed of a custom-built microphone and an Android app that studies non-speech body sounds – those of food intake, laugh, breathing, cough. We will certainly keep an ear out for promising developments such as these ones.

"BeWell: a smartphone application to monitor, model and promote wellbeing"Nicholas D. Lane, Mashfiqui Mohammod, Mu Lin, Xiaochao Yang, Hong Lu, Shahid Ali, Afsaneh Doryab, Ethan Berke, Tanzeem Choudhury, Andrew T. Campbell5th international ICST conference on pervasive computing technologies for healthcare2011~05
"BeWell: Sensing sleep, physical activities and social interactions to promote wellbeing"Nicholas D Lane, Mu Lin, Mashfiqui Mohammod, Xiaochao Yang, Hong Lu, Giuseppe Cardone, Shahid Ali, Afsaneh Doryab, Ethan Berke, Andrew T Campbell, Tanzeem ChoudhuryMobile Networks and Applications, volume 19, issue 32014~06
"BodyBeat: A Mobile System for Sensing Non-Speech Body Sounds"Tauhidur Rahman, Alexander Adams, Erin Carroll, Bobby Zhou, Huaishu Peng, Mi Zhang, Tanzeem ChoudhuryInternational Conference on Mobile Systems, Applications and Services (MobiSys), New Hampshire, USA2014~06
"Ear-Phone: A Context-Aware Noise Mapping using Smart Phones"Rajib Rana, Chun Tung Chou, Nirupama Bulusu, Salil Kanhere, Wen HuCoRR, abs/1310.42702013
"A continental-scale tool for acoustic identification of European bats"Walters, Charlotte L.; Freeman, Robin; Collen, Alanna; Dietz, Christian; Fenton, M. Brock; Jones, Gareth; Obrist, Martin K.; Puechmaille, Sebastien J.; Sattler, Thomas; Siemers, Bjoern M.; Parsons, Stuart; Jones, Kate E.Journal of Applied Ecology2012
"Microphones as Sensors: Teaching old Microphones New Tricks"Not specifiedThe Economist2013~06
"MusicalHeart: A Hearty Way of Listening to Music"Shahriar Nirjon, Robert F. Dickerson, Qiang Li, Philip Asare, and John A. Stankovic, Dezhi Hong, Ben Zhang, Xiaofan Jiang, Guobin Shen, and Feng ZhaoSenSys’122012~11
"Crowdsourcing of Pollution Data using Smartphones"Matthias Stevens & Ellie D’HondtUbiComp ’102010~09
"NoiseSPY: A Real-Time Mobile Phone Platform for Urban Noise Monitoring and Mapping"Eiman KanjoMobile Networks and Applications, volume 152009~09
"Towards Personal Stress Informatics: Comparing Minimally Invasive Techniques for Measuring Daily Stress in the Wild"Phil Adams, Mashfiqui Rabbi, Tauhidur Rahman, Mark Matthews, Amy Voida, Geri Gay, Tanzeem Choudhury, Stephen Voida8th International Conference on Pervasive Computing Technologies for Healthcare2014
"Use of Mobile Phones as Intelligent Sensors for Sound Input Analysis and Sleep State Detection"Krejcar, Ondrej; Jirka, Jakub; Janckulik, DaliborSensors 11(6)2011
"SoundSense: Scalable Sound Sensing for People-Centric Applications on Mobile Phones" Hong Lu, Wei Pan, Nicholas D. Lane, Tanzeem Choudhury and Andrew T. CampbellMobiSys’092009~06
"SpiroSmart: Using a Microphone to Measure Lung Function on a Mobile Phone"Eric C. Larson, Mayank Goel, Gaetano Boriello, Sonya Heltshe, Margaret Rosenfeld, Shwetak N. PatelUbiComp’ 122012~09
"StressSense: Detecting Stress in Unconstrained Acoustic Environments using Smartphones"Hong Lu, Mashfiqui Rabbi, Gokul Chittaranjan, Denise Frauendorfer, Marianne Schmidt, Andrew Campbell, Daneil Gatica-Perez, and Tanzeem ChoudhuryProceedings of Ubicomp 2012 2012~09
"A Survey of Mobile Phone Sensing"Nicholas D. Lane, Emiliano Miluzzo, Hong Lu, Daniel Peebles, Tanzeem Choudhury, and Andrew T. CampbellIEEE Communications Magazine2010~09
"Acoustic Scene Classification"D. Barchiesi, D. Giannoulis, D. Stowell and M. D. Plumbley.Accepted by IEEE Signal Processing Magazineto be published
"Participatory noise mapping works! An evaluation of participatory sensing as an alternative to standard techniques for environmental monitoring"Ellie D’Hondt, Matthias Stevens, An JacobsPervasive and Mobile Computing 9(5)2013~10
"Participatory noise pollution monitoring using mobile phones"Nicolas Maisonneuve, Matthias Stevens and Bartek OchabInformation Polity 152010
"The era of ubiquitous listening dawns"David TalbotMIT Technology Review2013~08
Posted in Mobile Trends, Sensors, Uncategorized | Tagged | 1 Comment

Meet us at MWC

This year, yet again, OpenSignal will be at Mobile World Congress. The conference in Barcelona is one of the high points of the year for everyone involved in the mobile space and a great space to see the developing trends in mobile and related industries. Our stand is in the same place as last year, so if you’re going to be at MWC then do come and look us up. The map below is a handy guide on how to find us, we’ll be in Hall 7 at booth 7b15. mwc_booth_directions


The map is slightly confusing (the aerial walkway looks suspiciously like a river) but if you’re in that area then the booth (and people within it) will look something like this:

2014-02-27 16.14.24We hope to see you at MWC, the conference is always productive and exciting and we’re looking forward to forming many more fruitful partnerships there again this year.

See you at booth 7b15!

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Mobile Sensor Networks: Creating a Social Laboratory

What is a smartphone? That seems like a simple question. On one level a smartphone is a communication device that allows people to communicate with each other, either by text or call, or over the Internet. The focus is always on person-to-person communication, but the modern smartphone is capable of communicating in ways that don’t require the involvement of any person at all.

Smartphones are increasingly laden with sensors, with common devices containing a barometer, lightmeter and compass amongst others. This means that the surface of the earth is increasingly being covered by a dense network of always-on sensors, capable of gathering huge amounts of information about the world and its inhabitants. This network is now being tapped into for the purposes of scientific research.

Our new White Paper on Mobile Sensor Networks examines the new research that can be carried out with this technology, arguing that crowdsourced mobile sensor networks have the potential to revolutionise scientific study; as they allow for the collection of sensor data at a hitherto-impossible scale and granularity.

Read the full paper here – Mobile Sensor Networks: Creating a Social Laboratory

Posted in Mobile Trends, Reports, Sensors | Tagged , , , , , , , | Leave a comment

New Report: The Global Prevalence of Dual-SIM Android Devices

Dual-Sim Android devices, we thought, were relatively uncommon. No one at OpenSignal owns a Dual-SIM device, despite being more aware than most about the coverage blackspots that plague every city in the world – including our own office.

We had assumed that Dual-Sim Android devices were a curiosity, with little commonplace application and low levels of popularity. Frankly, we couldn’t have been more wrong. Upon analysing the OpenSignal device library we discovered that 25% of global devices are Dual-SIM (or Multi-SIM) and that there are huge disparities between countries and regions. For this report, when we refer to ‘dual-SIM devices’ we refer to devices that are dual-SIM capable, as opposed to whether or not that capability in use (something that we cannot detect using this specific database). We have also used Multi-SIM and Dual-SIM interchangeably, as they show up the same in our investigative methodology but most Multi-SIM devices are Dual-SIM.

The US and UK both have low levels of Dual-SIM device penetration, at 1% and 4% respectively. Markets, including Indonesia, India, Russia, Thailand and the Phillippines (which account for almost 2 billion people), see multi-SIM Android device usage at over 40% – illustrating the dangers of basing one’s understanding of the mobile ecosystem on one’s immediate surroundings. The country with the highest prevalence of Dual-SIM devices was Nigeria, where Dual-SIM Android Devices account for 66% of the Android market.

Read the full report here:  The Global Prevalence of Dual-SIM Android Devices

Posted in Mobile Trends, Reports | Tagged , , , , | Leave a comment

The Spring 2015 iPad Translation Challenge!

As many of you may know, the first iPad Translation Challenge ran from 1 Dec 2014 to 1 Jan 2015. We recently announced the results of that challenge, and at the end, promised a new challenge very soon.

iPad won by Serbian translator Nikola Stojanović

The iPad won by Serbian translator Nikola Stojanović

Well here it is!

The Spring 2015 iPad Translation Challenge will run from 22 January to 22 April 2015. The 22nd of April is Earth Day – which represents the global community we hope will participate in OpenSignal’s mission of crowdsourcing signal and sensor networks.

What are we translating?

The last translation challenge focused on the OpenSignal Android app, but this time, we have the OpenSignal Android app, the OpenSignal website, and the WeatherSignal app (learn more about WeatherSignal here) available to translate. To access the translation system, click on the following links for the project you want to translate:

Don’t forget that to submit translations, you need to register – otherwise we won’t know how many words you’ve translated! Registering only takes 15 seconds. If you have any questions on how to get started, just email me at

What is the challenge?

To determine the goal for this translation challenge, we’re going to play around with some language and smartphone statistics.

  • 6,909 – the number of distinct living languages in the world (Ethnologue)
  • 12 – the number of letters in the smallest alphabet, from the language Rotokas
  • 2 – the number of billions of smartphones expected to be in use in 2015
  • 41,454 = 6,909 * 12 / 2- the number of words that we hope to translate by 22 April!
Human Language Families Map

Human Language Families Map; Source: Wikimedia

What about the iPad Prize Draw?

It wouldn’t be an iPad Translation Challenge without an iPad Prize Draw! This time, we’re changing the rules a little to give more people the chance to participate in the draw. For every 500 words that you translate, you will get a ticket in the draw. So, if you have translated 1500 words, you’d get three tickets. Translated even more? More tickets still!

As with the last translation challenge, the prize will be an iPad Mini. If an Apple store is not available in your location, we will get you a comparable, alternative tablet.

Are you still giving out T-shirts?

Definitely! The rules for T-shirts haven’t changed. If you translate 1500 words, or refer someone who translates 1500 words, then you get an OpenSignal T-shirt!

Ready, get set, GO! Please join us for this massive, 41,454-word translation effort during our Spring 2015 iPad Translation Challenge. By helping us you help millions of people in the world get coverage or weather data, and you participate in new waves of crowdsourcing, technology, and citizen science.

Thank you!

Posted in Competition, Help Needed!, Translation | Leave a comment

“Can you hear me now?” The December iPad Translation Challenge

The results are in!

Our December Translation Challenge ran from 1 December 2014 to 1 January 2015 – we asked our community to help us reach 50% translation in every language for our Android App. How did we all do?

Translation progress, 1 Dec to 1 Jan

Translation progress, 1 Dec to 1 Jan

At the end of the translation challenge, there were 9 languages at 100% and 16 languages over 50%, out of 35 languages in the translation system. So, while we didn’t make it so that all languages were over 50%, we nearly had 50% of all languages at 50% translation!

What about the iPad draw?

As promised, anyone who translated 1500 words or more was entered into our iPad draw (as this was the first ever translation challenge + iPad Draw, translators who translated over 1500 words before the challenge was announced on 1 Dec were included in the draw). And the winner is:

Nikola Stojanović
Nikola Stojanović (19), from Belgrade, Serbia, is a student; translator, designer and video-maker in his free time. He attends the School of Electrical and Computer Engineering of Applied Studies, and his section is Audio-Video Technologies. He is already enjoying his new iPad Mini!


Nikola won the iPad Prize Draw! Photo Credit: Nikola Stojanović

We would also like to thank all of our other contributors who have participated in our crowdsourcing translation effort. We gratefully thank our participants who have translated 1500 words or more:

Some users chose to remain anonymous
Ferhad Fidan
Desy Kristianti
Thomas Lautenschlager
Francisco Palaio
Maikel Simões
Nikola Stojanović
Georgios Varsos
Univ. of Cambridge

Thank you to our participants who have contributed any amount up to 1500 words to our translation effort:

Some users chose to remain anonymous
Irena Atnaguzina
Univ. of Glasgow
Andrej Guseff
Pi R Square
Santiago Lorenzo
Lasuardi Permana
Jeremy Rieunier
Alessandro Vaccaro
Guiliano Zamboni

Thank you so much to all of you! With your help, our apps and mission can reach more people around the world, increasing our global community for crowdsourcing objective signal and sensor data.

Want to be part of the next iPad draw? Stay tuned for the launch of the next iPad Translation Challenge this week!

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Our academic partners

At OpenSignal we like to promote and keep track of all research related to our fields of interest. If, like us, you speak crowdsourcing, mobile sensor technology and big data, you might want to check out some of these papers and on-going research projects that use our data.

Featured papers and major academic collaboration

Many academics in different fields – from computer science to medicine, meteorology or economics – have shown interest in what we do. We’ve been contacted by teachers and students with the most interesting research topics and have willingly shared our data with them, often getting involved in their projects.

Here is a brief presentation of some of the awesome papers and on-going research projects produced by our academic partners.

Matteo Venanzi, University of Southampton

“Trust-Based Fusion of Untrustworthy Information in Crowdsourcing Applications”, by Matteo Venanzi, Alex Rogers and Nicholas R. Jennings.

-  Trust-Based Algorithms for Fusing Crowdsourced Estimates of Continuous Quantities, by Matteo Venanzi, Thesis for the degree of Doctor of Philosophy.

Matteo Venanzi’s research focuses on the reliability of information obtained through crowdsourcing applications. Particularly, he’s interested in the way information provided by individuals or devices of varying degrees of trustworthiness is aggregated. With this in mind, he developed a series of algorithms that aim to improve the accuracy of crowdsourced data, which he has applied to the OpenSignal dataset. His results have shown trust-based models to outperform other fusion methods.

Aart Overeem, Royal Netherlands Meteorological Institute 

 - “Country-wide rainfall maps from cellular communication networks”, by A. Overeem, H. Leijnse, and R. Uijlenhoet.

Overeem et al show how rainfall can be monitored in real time by studying microwave links employed in cellular communication networks; they use data from OpenSignal to understand the potential scope. As demonstrated by the authors, path-averaged rainfall intensity can be estimated, by means of an algorithm, from radio signals’ attenuation between transmitter and receiver.

- “Crowdsourcing urban air temperatures from smartphones battery temperatures”, by A. Overeem, J. C. R. Robinson, H. Leijnse, G. J. Steeneveld,B. K. P. Horn, and R. Uijlenhoe.

This article featuring our very own CTO, James Robinson, as co-author proves that urban air temperatures can be retrieved with relative accuracy from crowdsourced smartphone battery temperatures. Applying a heat transfer model to the OpenSignal dataset, estimated daily mean air temperatures were calculated for eight major cities. These values were then validated against data provided by World Meteorological Organisation certified stations, with satisfactory results.

If you want to read more about this research, check out this previous blogpost:

Clifford F. Mass, University of Washington

- “Surface Pressure Observations from Smartphones: A Potential Revolution for High-Resolution Weather Prediction?”, by Clifford F. Mass and Luke E. Madaus.

Professor Mass and Luke Madaus look into the potential of pressure readings crowdsourced from smartphones via applications like WeatherSignal. The uses of this readily available data include the forecasting of short-term mesoscale phenomena such as rainfall and winds. This study suggests that exploiting pressure readings from smartphones along with more conventional weather observations leads to better predictions.

Catherine Muller, University of Birmingham Urban Climate Lab (BUCL)

- “Crowdsourcing for Climate and Atmospheric Sciences: Current Status and Future Potential”, by C.L. Muller, L. Chapman, S. Johnston, C. Kidd, S. Illingworth, G. Foody, A. Overeem, R. Graves.

Catherine Muller and collaborators – including OpenSignal’s Brand Strategist Samuel Johnston – carry out a comprehensive review of the existing methods to crowdsource atmospheric data, from Citizen Science projects and smartphone devices to social media and “hidden” networks. As well as providing a brief description of each of these approaches, the paper deals with both the question of assessing the accuracy of the data thus obtained and its many potential applications.

Sagi Dalyot, Technion- Israel Institute of Technology

- “Towards the Use of Crowdsourced Volunteered Meteorological Data for Forest Fire Monitoring”, by Sagi Dalyot and Shay Sosko (to be published).
- “Densification and Fusion of Static GeoSensor Networks Monitoring Forest Fires via Crowdsourcing”, by Shay Sosko (on-going research for a Master thesis, supervised by Sagi Dalyot).

Both these works employ the WeatherSignal dataset to study the use of Volunteered Geographic Information (VGI) as a way of monitoring and predicting forest fires. Environmental data crowdsourced from smartphones appears to be an efficient way of complementing the static geo-sensor network used to provide hazard early warnings and compensating for its limitations – such as lack of mobility, coverage issues and low density.

Pantelis Koutroumpis, Imperial College London & Berthold Horn, CSAIL at MIT

Pantelis Koutroumpis is one of our longtime academic collaborators and his research explores the intersection of telecommunications and economic development. Together with Aija Leiponen, Pantelis has been using some of the OpenSignal data to study femtocells in the city of Boston.

This is a subject that has also interested another of our closest partners, Berthold Horn from MIT. Co-author of one of the papers mentioned above, several of our blogposts feature his insightful remarks and he has written a report on femtocells that has appeared on our website.

Rumi Chunara, NYU Computer Science & Engineering and the Global Institute of Public Health

Rumi Chunara and her research group have been studying the way local urban weather relates to certain health outcomes. That is, in what way could climate variations at the street or neighborhood level affect the health of the population living in that specific area? The OpenSignal and WeatherSignal datasets were used as a mean to analyse climate variation from neighbourhood to neighbourhood in the cities of London and New York. Clusters where climate is similar were then studied for similarities in specific health outcomes, including asthma, depression and blood pressure. Professor Chunara’s on-going research suggests that crowdsourced weather data from smartphones are a promising resource to study the relationship between climate variation and health outcomes.

To learn more about Rumi’s work and research, have a look at her web site:

From the OpenSignal team

- “Modelling Download Throughput of LTE Networks”, by Joe Cainey, Brendan Gill, Samuel Johnston, James Robinson and Sam Westwood.

Last but not least, we conduct our own research too! In a recently published paper, Data Scientist Joe Cainey, together with part of our team, has presented a novel model to study download throughput of LTE networks. Applying his linear model to a set of data collected with the OpenSignal application, Joe shows that download throughput is dependent on a number of variables, including signal quality and strength, temporal factors, network operator and even the type of device. This is a crucial result in understanding how to create the best mobile experience for users.

If you want to read further…

We love the breadth of research citing OpenSignal or WeatherSignal – there are over 80 papers mentioning us, you can find them all in the table below.

Included in the same table are another dozen academic publications made by members of our team on various subjects – you might want to check out Pau Pérez’s work on privacy and security issues or James Robinson’s incursion into digital edition.

Get in touch!

If you’re interested in working with our data for an academic project, we’d love to hear from you. You can get in touch with us  through the contact form of our website: We’re also teaming up with disaster agencies such UNMEER (the UN’s Ebola Response team) and FEMA to provide realtime data via our app CrisisSignal. Read Ellie’s blogpost for more information: CrisisSignal launched in ebola afflicted regions.

And if you want to know more about, or even join, our fabulous team – 4 PhDs, 8 nationalities and a lot of languages (from R and Python to Russian and Mandarin) – check out our team page.

Happy reading!


Publisher / Published in
"Crowdsourcing for Climate and Atmospheric Sciences: Current Status and Future Potential"International Journal of ClimatologyMuller, C.L., Chapman, L., Johnston, S., Kidd, C., Illingworth, S., Foody, G., Overeem, A., Graves, R.2015/01
"Making Sense Out of Information Chaos"SIGUCCS '14 Proceedings of the 2014 ACM SIGUCCS Annual Conference on User Services Conference, pages 33-36Mark Fitzgerald2014/11
"Practical challenges for large-scale deployment of mHealth solution insights from a field trial"Global Humanitarian Technology Conference (GHTC), 2014 IEEE, 235 - 241Kuntagod, N. ; Paul, S. ; Kumaresan, S. ; Ganti, S.2014/10
"Caiipa: Automated Large-scale Mobile App Testing through Contextual Fuzzing"MobiComChieh-Jan Mike Liang, Nicholas D. Lane, Niels Brouwers, Li Zhang, Börje F. Karlsson, Hao Liu, Yan Liu, Jun Tang, Xiang Shan, Ranveer Chandra, Feng Zhao2014/09
"Surface Pressure Observations from Smartphones: A Potential Revolution for High-Resolution Weather Prediction?"Bulletin of the American Meteorology Society, Volume 95, Issue 9Clifford F. Mass, Luke E. Madaus2014/09
"Modelling Download Throughput of LTE Networks"2014 IEEE 39th Conference on Local Computer Networks Workshops (LCN Workshops)Joe Cainey, Brendan Gill, Samuel Johnston, James Robinson, Sam Westwood2014/09
"Atmos: a hybrid crowdsourcing approach to weather estimation"UbiComp '14 Adjunct Proceedings of the 2014 ACM International Joint Conference on Pervasive and Ubiquitous Computing: Adjunct Publication, pages 135-138Evangelos Niforatos, Athanasios Vourvopoulos, Marc Langheinrich, Pedro Campos, Andre Doria2014/09
"Smart Health: A Context-Aware Health Paradigm within Smart Cities"IEEE Communications Magazine, volume 52, issue 8Agusti Solanas, Constantinos Patsakis, Mauro Conti, Ioannis S. Vlachos, Victoria Ramos, Francisco Falcone, Octavian Postolache, Pablo A. Pérez-Martínez, Roberto Di Pietro, Despina N. Perrea, and Antoni Martínez-Ballesté2014/08
Trust-Based Algorithms for Fusing Crowdsourced Estimates of Continuous QuantitiesThesis for the degree of Doctor of Philosophy, University of Southampton, Faculty of Physical Science and Engineering, Electronics and Computer ScienceMatteo Venanzi2014/08
"UK Citizen Rainfall Network: a pilot study"Weather, Volume 69, Issue 8, pages 203–207Samuel Michael Illingworth, Catherine Louise Muller, Rosemarie Graves and Lee Chapman2014/08
"The CantApp: Chaucer's Canterbury Tales on mobile phone and tablet"New Chaucer Society conference, Reykjavik, 18 July 2014Barbara Bordalejo, Claire Campbell, Terry Jones, Richard North, James Robinson, Peter Robinson, Mari Volkosh2014/07
"Characteristics of Citizen-contributed Geographic Information"Huerta, Schade, Granell (Eds): Connecting a Digital Europe through Location and Place. Proceedings of the AGILE'2014 International Conference on Geographic Information Science, Castellón, June, 3-6, 2014.Spyridon Spyratos, Michael Lutz, Francesco Pantisano2014/06
"Extended Kalman Filtering and Pathloss modeling for Shadow Power Parameter Estimation in Mobile"International Journal on Smart Sensing and Intelligent Systems vol. 7, no. 2George P. Pappas, Mohamed A. Zohdy2014/06
"SEEDS: A Software Engineer’s Energy-Optimization Decision Support Framework"International Conference on Software Engineering (ICSE)Irene Manotas, Lori Pollock, James Clause2014/06
"SDN/NFV Based Web Cache Consistency and JavaScript Transmission Acceleration Scheme to Enhance Web Performance in Mobile Network"The Journal of Korea Information and Communications Society '14-06, Vol.39B, No.06Gijeong Kim, Sungwon Lee2014/06
"Urban WiFi Characterization via Mobile Crowdsensing"Network Operations and Management Symposium (NOMS), 2014Arsham Farshad, Mahesh K. Marina, Francisco Garcia2014/05
"Towards Evaluating Type of Service Related Quality-of-Experience on Mobile Networks"7th IFIP Wireless and Mobile Networking Conference (WMNC 2014), Vilamoura, Algarve, PortugalChristos Tsiaras, Anuj Sehgal, Sebastian Seeber, Daniel Doenni, Burkhard Stiller, Jürgen Schönwälder and Gabi Dreo Rodosek2014/05
"On the Evaluation of a User-centric QoE-based Recommendation Tool for Wireless Access"Institute of Computer Science (ICS) of the Foundation for Research and Technology - Hellas (FORTH)Michalis Katsarakis, Vasileios Theodosiadis, and Maria Papadopouli2014/05
"On the use of mobile phones and wearable microphones for noise exposure measurements : calibration and measurement accuracy"Student thesis, Ecole de technologie supérieure, Université du QuébecRomain Dumoulin2014/05
"Upgrading Your Android, Elevating My Malware: Privilege Escalation Through Mobile OS Updating"35th IEEE Symposium on Security and PrivacyLuyi Xing, Xiaorui Pan, Rui Wang, Kan Yuan and XiaoFeng Wang2014/05
"Forecasting mobile transmission reliability using crowd-sourced cellular coverage data"Systems and Information Engineering Design Symposium (SIEDS), 2014Martin, Michelle C.; Kwan, Anne M. ; Forte, Eric J. ; Zhang, Stan F. ; Patek, Stephen D.2014/04
"Using Combinatorial Approaches for Testing Mobile Applications"2014 IEEE International Conference on Software Testing, Verification, and ValidatiSergiy Vilkomir and Brandi Amstutz2014/04
"Predictive Radio Access Networks for Vehicular Content Delivery"Student thesis, Queen's University, Kingston, Ontario, CanadaHatem Abou-zeid2014/04
"Australian mobile broadband network performance: Mobile apps as one possible way to provide consumer information"Australian Journal of Telecommunications and the Digital Economy, volume 2, issue 1Shara Evans2014/03;dn=187252544779517;res=IELBUS
"A Study on Security Threats and Dynamic Access Control Technology for BYOD, Smart-work Environment"Proceedings of the International MultiConference of Engineers and Computer Scientists 2014 Vol II, IMECS 2014, March 12 - 14, 2014, Hong KongEun Byol Koh, Joohyung Oh, and Chaete Im2014/03
"Mobile Quality of Experience: Recent Advances and Challenges"International Conference on Pervasive Computing and Communications Workshops (PERCOM Workshops), 2014Vasilios A. Siris, Konstantinos Balampekos and Mahesh K. Marina2014/03
"Big Data for Big Business? A Taxonomy of Data-driven Business Models used by Start-up Firms"Cambridge Service AlliancePhilipp Max Hartmann, Mohamed Zaki, Niels Feldmann and Andy Neely2014/03
"A Feasibility Study and Development Framework Design for Realizing Smartphone-based Vehicular Networking Systems"Transactions on Mobile Computing, IEEE (Volume:PP, Issue: 99 )Yongtae Park, Jihun Ha, Seungho Kuk, Hyogon Kim, Chieh-Jan Mike Liang, and JeongGil Ko2014/03
"Is Node.js a viable option for building modern web applications? A performance evaluation study"Computing, SpringerIoannis K. Chaniotis, Kyriakos-Ioannis D. Kyriakou, Nikolaos D. Tselikas2014/03
"Työkalut etätyönä toteutetussa Android-pelikehityksessä"Student thesis, Karelia University of Applied Sciences, FinlandToni Paavola2014/03
"Mobile Application as a Business Strategy"Student thesis, Turku University of Applied SciencesRudy Dordonne2014/02
"Towards Scalable Automated Mobile App Testing"Microsoft ResearchRanveer Chandra, Börje F. Karlsson, Nic Lane, Chieh-Jan Mike Liang, Suman Nath, Jitu Padhye, Lenin Ravindranath Sivalingam, and Feng Zhao2014/01
"Opportunistic mobile games using public transportation systems: a deployability study"Multimedia SystemsDario Maggiorini, Christian Quadri, Laura Anna Ripamonti2014/01
"Spatially Resolved Monitoring of Radio-Frequency Electromagnetic Fields"SENSEMINE'13 Proceedings of First International Workshop on Sensing and Big Data MiningDavid Hasenfratz, Silvan Sturzenegger, Olga Saukh, and Lothar Thiele2013/11
"Long-term fairness in multi-cell networks using rate predictions"7th IEEE GCC Conference and Exhibition (GCC), 2013Abou-zeid, H.; Hassanein, H.S. ; Zorba, N.2013/11
"Designing public safety mobile applications for disconnected, interrupted, and low bandwidth communication environments"IEEE International Conference on Technologies for Homeland Security (HST), 2013Erickson, P.; Weinert, A. ; Breimyer, P. ; Samperi, M. ; Huff, J. ; Parra, C. ; Miller, S.2013/11
"Study, analysis and implementation of an Enterprise Mobility Management System"Student thesis, Universitat Politècnica de CatalunyaDavid Arance Garcia2013/11
"Predictive green wireless access: exploiting mobility and application information"Wireless Communications, IEEE, Volume 20, Issue 5H. Abou-Zeid, H.S. Hassanein2013/10
"Predicting mobile network bandwidth fluctuation to enhance video stream service quality"Science and Information Conference (SAI), 2013Peart, A.; Lockett, A. ; Adda, M.2013/10
"Pazl: A Mobile Crowdsensing based Indoor WiFi Monitoring System"9th International Conference on Network and Service Management (CNSM), 2013Valentin Radu, Lito Kriara and Mahesh K. Marina2013/10
"u-map: a User-centric QoE-based Recommendation Tool for Wireless Access Markets"MobiComMichalis Katsarakis, Vasileios Theodosiadis, Manos Dramitinos, and Maria Papadopouli2013/09
"Context Virtualizer: A Cloud Service for Automated Large-scale Mobile App Testing under Real-World Conditions"Microsoft ResearchChieh-Jan Mike Liang, Nicholas D. Lane, Niels Brouwers, Li Zhang, Börje Karlsson, Hao Liu, Yan Liu, Jun Tang, Xiang Shan, Ranveer Chandra, Feng Zhao2013/09
"Attacco ad Android: obiettivi, rischi e contromisure"Published online, Università degli Studi di Verona http://profs.scienze.univr.itAlessandro Menti, Mattia Zago2013/09
"An Empirical Study of API Stability and Adoption in the Android Ecosystem"29th IEEE International Conference on Software Maintenance (ICSM), 2013Tyler McDonnell, Baishakhi Ray, Miryung Kim2013/09
"m-Carer: Privacy-Aware Monitoring for People with Mild Cognitive Impairment and Dementia"IEEE Journal on Selected Areas in Communications, (Volume:31, Issue: 9 )Agusti Solanas, Antoni Martinez-Balleste, Pablo A Pérez-Martinez, Albert Fernandez de la Pena, Javier Ramos2013/09
"Crowdsourcing urban air temperatures from smartphone battery temperatures"Geophysical Research Letters, vol. 40A. Overeem,J. C. R. Robinson, H. Leijnse, G. J. Steeneveld,B. K. P. Horn, R. Uijlenhoet2013/08
"The Social Audit and Corruption in Developing Countries"Published online, University of North CarolinaRobert M. González2013/08
"Identification of Present-Day Transport Pilot Workflow and Derivation of Mobile Aids"2013 AVIATION TECHNOLOGY, INTEGRATION, AND OPERATIONS CONFERENCE, volume 3Theo Hankers, Peter Hecker, Nima Barraci, Jens Schiefele2013/08
"Crowdsourcing urban air temperatures from smartphone battery temperatures"Geophysical Research Letters, vol. 40, issue 15A. Overeem, J. C. R. Robinson, H. Leijnse, G. J. Steeneveld,B. K. P. Horn, and R. Uijlenhoe2013/08
"Crowdsourcing and its Impact on Future Internet Usage"Information Technology Methoden und innovative Anwendungen der Informatik und Informationstechnik. Volume 55, Issue 4Phuoc Tran-Gia, Tobias Hoßfeld, Matthias Hartmann, Matthias Hirth2013/07
"Fostering innovation: Factors that attract and retain third party developers in mobile ecosystems"Student thesis, Lund UniversitySinan Deniz, Ferdia Kehoe2013/06
"Comments of CTIA – The Wireless Association"Before the Federal Communications Commission Washington, DCMichael F. Altschul, Christopher Guttman-McCabe, Robert F. Roche, Krista L. Witanowski2013/06
"The pursuit of citizens' privacy: a privacy-aware smart city is possible"IEEE Communications Magazine, (Volume:51, Issue: 6 )Antoni Martinez-Balleste, Pablo A. Perez-Martinez, Agusti Solanas2013/06
"Trust-Based Fusion of Untrustworthy Information in Crowdsourcing Applications"Proceedings of the 12th International Conference on Autonomous Agents and Multiagent Systems (AAMAS 2013), Ito, Jonker, Gini, and Shehory (eds.), May, 6–10, 2013, Saint Paul, Min- nesota, USA.Matteo Venanzi, Alex Rogers, Nicholas R. Jennings2013/05
"Netradar - Measuring the wireless world"11th International Symposium on Modeling & Optimization in Mobile, Ad Hoc & Wireless Networks (WiOpt), 2013Sonntag, S.; Manner, J. ; Schulte, L.2013/05
"Developing a user interface for a cross-platform web application"Student thesis, Helsinki Metropolia University of Applied SciencesMaxim Dolgobrod2013/05
"2D-ANIMAATIOT OSANA ANDROID-SOVELLUSTA"Student thesis, Jamk University of Applied SciencesHenri Honkonen2013/05
"Mobile network measurements - It's not all about signal strength"Wireless Communications and Networking Conference (WCNC), 2013 IEEES. Sonntag, L. Schulte, J. Manner2013/04
"The hidden costs of mobile applications: A cross-layer analysis of energy and spectrum waste of mobile applications"Student thesis, Fitzwilliam College, University of CambridgeNarseo Vallina-Rodriguez2013/04
"Android Tablet -Google Asus Nexus 7 with Android OS 4.2 (Jellybean)"Journal of the Canadian Health Libraries Association, 34Dale Storie2013/04
Contextual Fuzzing: Automated Mobile App Testing Under Dynamic Device and Environment ConditionsMicrosoft ResearchChieh-Jan Mike Liang, Nicholas D. Lane, Niels Brouwers, Li Zhang, Börje Karlsson, Ranveer Chandra, and Feng Zhao2013/03
"Erkennen und Abwehren von Angriffen im Mobilfunknetz auf Smartphones"Student thesis, Wilhelm Büchner Hochschule, Darmstadt, GermanyMarcus Prem2013/03
"Sensorium — The Generic Sensor Framework"Networked Systems 2013Albert Rafetseder, Florian Metzger, Lukas Pühringer, Yanyan Zhuang, Justin Cappos2013/03
"Country-wide rainfall maps from cellular communication networks"Proceedings of the National Academy of Sciences, vol. 110, issue 8Overeem, A.; Leijnse, H.; Uijlenhoet, R.2013/02
"Fast Text Rendering on Embedded GPUs"Student thesis, University of GothenburgJonathan Gustafsson2013/02
"Massive WiFi Data Gathering"Journal of CSE GradOSF12, vol. 0, no. 1Salvador Aguinaga, Jianxu Chen2012/11
"Comparison of the Performance and Capabilities of Femtocell versus Wi-Fi Networks"Student thesis, Naval Postgraduate School, Monterey, CaliforniaJames K. Bare2012/09
"Predictive protocol for the scalable identification of RFID tags through collaborative readers"Computers in Industry (volume 63, issue 5)Rolando Trujillo-Rasua, Agusti Solanas, Pablo A. Pérez-Martínez, Josep Domingo-Ferrer2012/08
"W3-Privacy: the Three Dimensions of User Privacy in LBS"MobiHoc 2011, the Twelfth ACM International Symposium on Mobile Ad Hoc Networking and ComputingPablo A Pérez-Martínez, Agusti Solanas2011/05
"Location Privacy Through Users' Collaboration: A Distributed Pseudonymizer"Third International Conference on Mobile Ubiquitous Computing, Systems, Services and Technologies, 2009. UBICOMM '09Pablo A. Pérez-Martínez, Agusti Solanas, Antoni Martinez-Balleste2009/10
"Exploring the potential of volunteered geographical information as a source for special data acquisition"IOP Conf. Series: Earth and Environmental Science, 20Izyana Ariffin, Badariah Solemon, Rina Md. Anwar, Marina Md. Din, Nor Nashrah Azmi2014
Android Best PracticesSpringerGodfrey Nolan, Onur Cinar, David Truxall2014
"Mobile Phones as Ubiquitous Social and Environmental Geo-Sensors"to be published in Yan, Z., ed., Encyclopedia of Mobile Phone Behavior (Volumes 1, 2, & 3). Hershey, PA: IGI GlobalGünther Sagl, Bernd Resch2014
"An Examination of Typographic Standards and Their Relevance to Contemporary User-Centred Web and Application Design"Cross-Cultural Design, Lecture Notes in Computer Science Volume 8528, SpringerIan Christopher Dyer2014
"Enhancing Mobile Video Streaming by Lookahead Rate Allocation in Wireless Networks"Proc. IEEE Consumer Commun. and Netw. Conf.(CCNC)Hatem Abou-zeid, Hossam S. Hassanein, and Nizar Zorba2014
"Efficient Lookahead Resource Allocation for Stored Video Delivery in Multi-Cell Networks"Proc. IEEE Wireless Commun. and Netw. Conf.(WCNC)Hatem Abou-zeid and Hossam S. Hassanein2014
"Mobilna aplikacija za daljinsko upravljanje fotoaparata"Student thesis, University of Ljubljana, Faculty of Computer and Information ScienceDušan Strgar2014
"Event-driven Middleware for Body and Ambient Sensor Applications"Student thesis, Technische Universität DarmstadtChristian Seeger2014
"The Indian App Ecosystem"The Indian Council for Research on International Economic RelationsRajat Kathuria and Sugandha Srivastav2014
"A Study of DNS Resolution Reducing Scheme for Web Performance Enhancement"Korea Information and Communications Society, Conference Winter 2014Gijeong Kim, Sungwon Lee2014
"GeoSpy: a Web3D platform for geospatial visualization"MapInteract '13 Proceedings of the 1st ACM SIGSPATIAL International Workshop on MapInteractionNikita Sharakhov, Nicholas Polys, Peter Sforza2013
"Comparing HTML5 Based Apps With Native Apps"Student thesis, Linnaeus University, Faculty of Technology, Department of Computer ScienceRebreniuk, Oleksii2013
"Saffy looks for the entry point into digital: simply read books and their first children’s book app"Student thesis, Simon Fraser UniversityLohnes, Heather Jillian2013
"APPLICATION LAYOUT TESTING FOR ANDROID MOBILE DEVICES"Student thesis, University of GroningenDaniël Kok2013
Android Design Patterns: Interaction Design Solutions for DevelopersWileyGreg Nudelman2013
"Optimal Predictive Resource Allocation: Exploiting Mobility Patterns and Radio Maps"Proc. IEEE Global Telecommunications Conference (GLOBECOM)Hatem Abou-zeid, Hossam S. Hassanein and Stefan Valentin2013
"Touch-Optimised Mobile Interface for Invenio Digital Library"Student thesis, Ecole polytechnique générale de LausanneYannick Tapparel2013
"Accounting for roaming users on mobile data access: issues and root causes"MobiSys '13 Proceeding of the 11th annual international conference on Mobile systems, applications, and servicesGuan-Hua Tu, Chunyi Peng, Chi-Yu Li, Xingyu Ma, Hongyi Wang, Tao Wang+, Songwu Lu2013
"Proposta de uma visita virtual 3D ao claustro do Museu de Aveiro"Student thesis, Universidade de AveiroRuben João Martins Carvalho2013ção.pdf
"Study of automatic adjusting Content depending on Screen Size and Context"Student thesis, Norwegian University of Science and TechnologyMathias Moen2013
"Business Model Analysis On Android App Stores"Student thesis, University of JyväskyläLauri Heikkinen2013
"Evaluation und Klassifikation der Anforderungen an Datenverbindungen mobiler Endgeräte"Student thesis, Universität UlmTill Fischer2013
"Vývoj mobilních aplikací pro platformu Apple iOS"Student thesis, Masarykova Univerzita Fakulta Informatiky, Brno, Czech RepublicVojtěch Bělovský2013
"The Impact of Perceived Quality, Perceived Sacrifice, and Perceived Value on Consumer’s Purchase Intention -An Empirical Study of 4G LTE Internet Service"Students thesis, National Taiwan University of Science and TechnologyHo-chung Wang2013
"Bringing internet to a village"Published online, Mälardalen University, SwedenJavier Del Sol Rodríguez2012
Posted in Academic, CrisisSignal, Open Signal Maps community, WeatherSignal | Leave a comment