When I first got my phone it was with at&t but the lady said they were joining together with cingular, said some places it would say at&t and others cingular with no extra charges. So far that has held true and I've never incurred extra charges, but since they merged my coverage has declined. I now seem to get horrible reception most places where I used to have full bars. I'm about to throw my phone through their window if the situation doesn't get better. The other problem I've had that pissed me off was 2 times I've started getting calls for other people, basically my phone was ringing when people would try and leave the other person a voice mail. At&t was apologetic when it has happened but if it happens a 3rd time I'll do everything in my power to get out of my contract early with no penalties.