Hi, I just bought an unlocked, Cingular branded 750 which I'm using with my Tmobile account. The issue that I have is: when I accept an incoming call I cannot be heard - I can hear everybody pretty clear but they can't hear me

Any ideas...? One more thing: I'm running 1.13-CNG software version.. Where can I find a link to wm6 update? Thank U for any help..