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-ifie
