This is my mother's phone, and she isn't great with any sort of technology, so getting good descriptions of problems out of her is difficult. Anyhow, there are a few problems that she's been having with her phone recently. 1. When she's driving on the highway, the GPS automatically turns on, and starts giving her directions to some random location she has never tried to get directions to. 2. The screen sometimes goes black and it's impossible to start or end calls. This sounds like a proximity sensor problem to me, but maybe there's something else going on. I have updated the phone to 2.1. And she said that the folks at the TMobile store reset it for her a few days ago. She said it got worse after the 2.1 upgrade. And the T-Mobile reset doesn't seem to have helped at all.