http://forum.xda-developers.com/forumdisplay.php?f=284 might help
PPCGeeks is mainly a CDMA based Forum, So we dont really deal with T-Mobile or AT&T, XDA-Developers, is our GSM Counterpart and would probly be a better Source for your needs. Still check out PPCGeeks, theres alot to learn on here and alot of people willing to help. Welcome.