I bought at ATT. I have trouble with reception now (never did), the device gets hot, the camera sucks (I bought 4 instead of getting a new camera) - Shots using camera flash are yellow, twice I had to reset because it went to no service and wouldn't fix itself without a reboot. Too many issues. I want to use my 3GS instead. Do I take it back to ATT? What about my upgrade. Do I have to wait two years now?