..the issue with using my old IPhone sim card in my new Nexus S is you don’t get the 3G network. The old Edge network is not bad, mainly because there is no one left using it, (my packets can hear their echos!) but we did a rudimentary, side-by-side test with an IPhone 4G, a Spring Samsung Epic (4g) and my new Nexus S on Edge. The edge came in last 🙁
I will be moving to T-Mobile next month solely for more bandwith.