undefinedMy 600 has worked perfectly for about a year. But now, I can receive calls only by using a handsfree headset, or using the speaker phone, i.e., when I try to answer a call by just holding it up to my ear...nothing happens...the callers claim that they cannot hear me and I cannot hear them). I went to the AT&T wireless store...they were clueless. They said call P1. P1 said that because my Treo is out of warranty, they would charge me $75.00 per call for support. I have tried resetting the 600...no change. Does anyone have any suggestions?