T-Mobile announced in Barcelona during the final day of Mobile World Congress that close to 5 million of its 34 million customers use Wi-Fi calls. Of those 5 million, around 1.25 million of those are using the new Wi-Fi for Android calling application. Furthermore, close to 40 million calls per month are performed over Wi-Fi networks using a T-Mobile device. Joshua Lonn, Direct of Product Development at T-Mobile said that they are … [read full article]