here is the problem. ALWAYS HAPPENS DURING CALLS. when i'm talking to someone and use SPEAKERS they can hardly hear me, i have to turn off speaker mode and talk from the phone. This is very annoying, i thought it was a defect but 3 units already and 2 models in tmobile store have the same problem. has this been discuss before cause this is a serious issue. i'm one of those guys that uses SPEAKERS CALLS 80% of the time. I'm with TMOBILE lastest firmware. (it happen in early firmware aswell).