iphone 4 to 4s sim card swap?

[acappellasaurus]

I currently have an iphone 4 activated with AT&T. I was recently given an iphone 4s by a friend, that is/was activated with Sprint.

My question is, can I just remove the sim card from my AT&T iphone 4 and stick it in the 4s and have it start working? Could it be that simple?

 

[Mr. B]

The phone will have to be unlocked first, but the 4S is a world phone (GSM and CDMA capable) so it should work if unlocked.

 

[acappellasaurus]

Even if my current phone (the 4) is activated with AT&T and the other phone (the 4S) is/was activate with Sprint?

 

[Mr. B]

I'm not sure, but if you already have both phones on hand... no harm in giving it a shot.

 

[acappellasaurus]

Thought about just trying it, but if it doesn't work, I don't want my other phone (the 4) to stop working somehow if I put the sim card back where it came from.

 

[zephramc]

Your Iphone4 will not stop working. It will likely go to the No Sim Detected screen, but that's the worst. Putting the SIM back in should fix it. If you have an AT&T old phone that's still active with a SIM card, you could put that card in and the phone would work (sans 3G data).

In regard to the 4S, as Mr. B said, it needs to be unlocked. Look at UltraSn0w. I used it for Iphone 2, 3G and 3GS before and it's pretty simple. Never for the 4/4S though. After googling it, they may be having some problems with the newest iOS version and the corresponding basebands.

I'd try it. You could brick the phone, but I think it's unlikely. The other option could be to sell the 4S out on Craigslist for $400-$500 and pocket the cash.

Anyways good luck.

 

[ares93]

^ Iphone's are pretty damn hard to hard-brick. Soft-bricking it is easier, yes. But those are easy to fix.