I've been struggling with my phone for 5 weeks now. I kept getting the infamous "Insert SIM card" msg, and voice quality has been terrible. The support people at Cingular had me try 4 (!!!) SIM cards in a row, they did the remote resetting and "tuning"(yeah right), and it's still acting up.On average, 50% of my calls are "one way", and I get many many dropped calls. They're going to send me another c417 (not new, refurbished), which I fully expect to be just as bad, now that I have read all the reviews. To be avoided... (the phone *and* Cingular)