Hello everyone! I recently switch from Sprint to T-Mobile. I ended up getting the Samsung Galaxy 4G and needless to say I am NOT happy. I have had the phone for 2 days and have already had problems. When I try to make a phone call the screen blanks out on me and won't turn back on until after the other person hangs up, if it even lasts long enough for a conversation without disconnecting me. Whenever I try to turn the screen back on with the power button afterwards it won't work and I have to end up taking the battery out of the phone to even get it working again. I have already tried a factory reset, keep screen app, different SIM cards, and also changed the accessibility settings for the power button ending a call. The other problem I seem to be having is whenever I try to put the call on speaker phone as soon as I make a call before the screen blacks out on me it automatically disconnects me. I was wondering if anyone else has had this problem?