T-Mobile today said it will make Wi-Fi calling available to all its postpaid customers for free. The move, announced at an event in San Francisco, is meant to help provide improved voice coverage in spaces where T-Mobile's network doesn't reach. Wi-Fi calls can be made from any open network. Even so, T-Mobile also debuted the T-Mobile Personal Cell Spot. This Wi-Fi hotspot, made by Asus, requires a $25 deposit and works with existing in-home internet service. It will permit T-Mobile customers to experience high-quality Wi-Fi calls when at home. It prioritizes voice functionality over data functionality. New phones sold by T-Mobile (including the iPhone 6) will be have this new functionality built in from the get-go, while older devices will receive an update to gain the new Wi-Fi calling features. The Personal Cell Spot will remain private; only those with the Wi-Fi password will be able to use it for calls and messaging. The Wi-Fi calling feature is free to use for all customers. T-Mobile offered a similar service back in 2007, called Hotspot@Home, but discontinued it in 2010. T-Mobile also announced a partnership with GoGo that will let its customers send and receive SMS/MMS messages from GoGo-equipped airplanes, as well as receive visual voicemail. The in-flight messaging service goes live September 17 and is free to all T-Mobile customers. The service will work with select phones at launch, including Samsung Galaxy S5, Apple iPhone 5s, HTC One, and LG G3 among others. More will be added over time.


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