Has anyone used both the AT&T Nexus One and T-Mobile Nexus One and noticed many differences? I figure they are must be very close to the same with a few small differences. The reason I am asking is I recently got the AT&T Nexus One and I am surprised to find it a has a few substantial problems. I'm wondering if the problems might be unique to the AT&T version. Perhaps since the T-Mobile N1 was the original and more widely sold, it was tested more thoroughly? The problems I have been noticing: 1)Auto Brightness - it's totally messed up and it leads to wild fluctuations in screen brightness. As someone who goes back and forth between indoor and outdoor frequently, this is a critical feature of the phone 2) There is a distinct lag in almost everything I do. I have used the HTC Incredible and it did not have this at all. I figure the specs for the 2 phones are similar so the speeds should be too. The lag on my N1 has been there right from the beginning. 3) Wifi connection dies randomly - have not had this problem with past phones. 4) The universal buttons are hard to push - it's very common to tap them and have nothing happen. I've used the Motorola Droid and HTC Incredible and on both the button pushing is FAR cleaner. (I'm pretty sure this is the same for AT&T and T-Mobile versions, but I guess I'm just getting on a roll with the gripes) 5) Low call volume - this problem is actually getting better as I've adjusted by pressing the phone to my ear a little more, but I wish it was a little louder.