New TMO from AT&T
Brought my Motorola Flipside unlocked Android (purchased as unlocked about 12 months ago). Put in SIM, and it seemed to work just fine. Until today. While talking several times, the audio goes away. Have to pull the battery and it comes back. Does not happen with AT&T SIM.
Can somebody tell me if TMO is switching transmit frequencies during a call?
As a corollary, I have several other unlocked GSM phones that dial and receive calls but do not have audio. Whats up with that? TMO didn't say "bring your own phone as long as you purchased it from TMO."