I switched from a jailbroken 3Gs to N1/T-mo because I was fed up with dropped AT&T calls. T-mo service has been great and I have come to like the N1 better ... I also have been using the N1 mostly on T-mo's Edge service *just to save battery*, which is does. A lot of the time I'm on wi-fi anyway and the only time I switch it to 3G is if I'm away from wi-fi and want to surf, use GoogleMaps or something where more broadband is needed. I live part-time in Milwaukee and part-time in Clearwater, FL, and in both my houses, both AT&T's Edge and T-Mo's Edge signal is stronger than their respective 3G signals. For experimentation purposes I popped my AT&T sim into the N1 and it worked fine on AT&T's Edge. Also, for the record, the iPhone may show more bars of signal than the Nexus, but if you look at dBm numbers only, you will see the signals are the same with the same sim on a given Edge network. I wouldn't consider myself a power user and don't really need the 3G most of the time -- but it's nice to know it's there when I want it. [Other battery-saving techniques I've discovered in addition to keeping it on Edge are: Advanced Task Killer app; APNDroid app, JuiceDefender & a cool widget that lets me toggle between 2-3G real fast called 2G-3G. And I also bought the extended battery, and let the juice run out totally about 4 times then recharged completely each time -- my battery lasts super long now :->)]