Monthly Archives: June 2015

What smartphone batteries know about São Paulo’s weather

A couple of years ago, our ginger CTO (yes, that’s how he likes to introduce himself!) was having a look at battery temperature data collected by OpenSignal users when he was struck by an unexpected discovery…insert suspense music here. What … Continue reading

Posted in Academic, Crowdsourcing, Sensors, WeatherSignal | Tagged | 1 Comment

The Privacy Implications of Mobile Sensor Networks

Back in February I gave a speech at Four Years From Now (FYFN) in Barcelona on the subject of privacy and mobile sensor networks. The full text of this speech is now available here on the OpenSignal website. Mobile sensor … Continue reading

Posted in Reports | Tagged , , | Leave a comment

Free Wi-Fi Guide: London

To celebrate the launch of our new app WifiMapper we are releasing a series of posts on the WiFi hotpots in various global cities that we are most confident are free. WifiMapper is an app to help you find free … Continue reading

Posted in Wi-FI Names | Tagged , , , , , , , | Leave a comment

App Update! WifiMapper iOS 1.0.3 released

A new version of WifiMapper on iOS is out! We’ve done a lot of work behind the scenes – it may not be immediately obvious, but the app is now smoother and slicker. We’ve really listened to you, our users … Continue reading

Posted in Beta-Testing, iOS Beta-Testing, WifiMapper | Leave a comment

The connected car: A primer

If you’ve shopped a new a car in the last few years, chances are you’ve been presented with a lot more options beyond leather seats and fancy speakers. Cars are getting connected, giving drivers the ability to bring apps and … Continue reading

Posted in Other | Tagged , , | 1 Comment

No Signal?! How about a new cell tower…

Continuing with the theme of solutions for no signal (started by the post No Signal?! Top things to try), I’d like to explore a much more permanent option for improving signal, albeit one that takes much longer and has a … Continue reading

Posted in Towers | 1 Comment

Data throttling: Why operators slow down your connection speed

You’re surfing on a wide-open 4G connection and suddenly see data speeds slow down to a snail’s pace. Mobile networks often experience big fluctuations in performance, but this downgrade remains persistent – say for several days – and then your speeds return to … Continue reading

Posted in LTE, Mobile Trends, Understanding signal | 1 Comment

The key to a faster network: A smaller network

We’re accustomed to seeing the cellular networks looming above us – big antennas mounted on towers, masts and the rooftops, beaming down their signals from up on high. But the mobile network soon will start taking on a more human … Continue reading

Posted in Understanding signal | Tagged | 2 Comments

State of LTE June 2015

Today we release our most recent version of the OpenSignal State of LTE report. We are now releasing this report every three months, as a way of keeping a close eye on the development and improvement of LTE around the … Continue reading

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

Stingrays: The new mobile tool of the surveillance state

If you thought the ocean was the only place you should be wary of stingrays, then think again. Stingray is the term first coined by Harris Corporation for a surveillance device it developed to intercept mobile phone signals. It was … Continue reading

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