M Michael F New member Feb 22, 2011 #1 would like to upgrade to the iphone 4 but i dont want to change my att plan ...so first does att find out that i am using a different phone and second is this even possbile, does iphone 4 use the same sim card?
would like to upgrade to the iphone 4 but i dont want to change my att plan ...so first does att find out that i am using a different phone and second is this even possbile, does iphone 4 use the same sim card?
