Hello, just aquired a 8900 , after a new SIM /reset. Everything worked for about a week, now I can't receive calls. If I call my phone, I get the music while I wait for someone to answer, but the BB gives no indication that a call is coming in, no ring, no screen change, etc. I've drilled down in all the profiles and checked for the obvious. Even took it by an ATT shop where they pulled the battery and reseated the SIM, but no change. Anyone have suggestions? The last thing I did before I notice this problem is download a ringtone through my browser and set it so that's what someone hears when they call me (before I pickup.) When I call my phone, I get the lady saying I can listen to the music while I wait for someone to answer. I can even hear it ring through the other phone between a break in the music....