OT for this thread but thought I'd share the new update:

1. HTC One confirmed launch date April 24th.
2. It will include uma/wifi calling

http://www.tmonews.com/2013/04/t-mob...lling-and-all/


Update - from howardchui.com forum, someone posted newer TMO phones work off of IMS and not UMA: http://support.t-mobile.com/docs/DOC-5059