5 Replies Latest reply: Apr 26, 2011 9:51 PM by Kaiser Mitsu
Chris Grayson Level 1 (35 points)

I just shattered the screen on my iPhone 4 (AT&T model).


I have a second iPhone 4 (also an AT&T model ... a friend switched carriers and got an Android. I have their now unused iPhone 4).


I want to know if I can swap my SIM card out from my iPhone 4 into their iPhone 4.


I think, in theory, that I should be able to do this, and if I restore their iPhone with my iTunes, that it should sync, and recognize it as if it were my same phone.


HOWEVER ... I had a problem with some features when I went from my iPhone 3Gs to my iPhone 4 when I upgraded: saying this device has a different serial number or UDID or something like that ... I think the problem was with my MobileMe account, but I'm not sure.


So I just want a qualified confirmation from someone who actually knows whether or not what I have proposed should work as I expect it to -- that with my SIM card, iTunes and my carrier will just recognize the new phone as if it were my old one -- or whether I'm way off-base in my understanding of how this should work.


Thank you for any assistance.