can i use 1 sim card with 2 phones? a 3g that i want to jailbreak & a 3gs that i dont want to mess with and just use att for both. is it as simple as just switching sim back and forth?

thanx for any help with this newbie question.

in UK is the iPhone payg SIM linked with the phone... That would not go with two phones... otherwise there is no problem- try!