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"Yesterday, we saw that LG's Optimus One might ship with WiFi calling, and that's all well and good, but a new leak suggests the Optimus was just the tip of a UMA iceberg to come. The above picture is one of several allegedly leaked training slides obtained by TmoNews, highlighting a dedicated \"Wi-Fi Calling\" app that may come pre-installed on upcoming Android devices, one of which just might be that new T-Mobile G2. Before you raid your piggybank in hopes of free VoIP calls, however, know that this app-ified brand of WiFi calling isn't necessarily the seamless switching solution we've wanted all along; that little yellow \"limitations\" tab reportedly explains that as soon as you leave the WiFi radius, you effectively drop your call."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.engadget.com/2010/09/26/t-mobile-to-bundle-wi-fi-calling-app-with-future-android-devices/>