When my 2Wire Gateway modem burned out (after nearly 7 years of reliable DSL service), I went to Best Buy and purchased a Motorola 2210 DSL Modem because I was told by a sales associate that was the only one authorized to work with AT&T DSL.
The Motorola 2210 modem is a toaster disguised as a modem. And I don't mean a Cylon. It gets hot..very very hot. It also started dropping my connection every half hour requiring me to reboot the modem and computer. I was told by customer service that there might be a line problem causing the drop (so much for wanting to sign up for U-Verse), after being insulted by being asked questions like "is your phone line connected" and "are the cables plugged in properly". I've had DSL since it was available in Dallas so I think we are beyond that. I finally went to Frys Electronics and bought an ActionTec GT724R Modem Gateway and installed it. It stays cool and set up was so easy. It works even better than the 2Wire with my Vonage service AND I haven't had a dropped signal now for months.
Get an ActionTec modem and stay way from that Motorola toaster!