OpenSignal: GSM WCDMA LTE WI-FI - 2G 3G 4G (Cell Coverage) Signal Maps

Here at telecomHall, as you already know, we share tips and interesting suggestions geared to the technical audience, people who works with Telecom and IT. But today we are going to talk about a very interesting application, but that doesn't only apply to these professionals, but to everyone that use wireless devices.
Introducing OpenSignal, an application that performs Cellular and Wi-Fi Networks data collection, and use it in building a comprehensive public map with information for all these networks around the World.

And gets it through a technique that should be increasingly exploited in other applications: the collaboration of all users, with beneficial results to all.

Then, let's go to see the application?