Problem... I can hear the Person just Fine but I keep dropping off to them... How do I fix this?? Is this a problem with the phone?? My Sim, or what? I'm using a Q9H Unlocked phone with my T-mobile Sim. It's got AT&T Garbage all over it too... but I don't think that's the problem. Is there a setting or something I need to fix or change or is the Phone just effed?