questions iPhone and AT&T

[Globug]

1. I don't have any computer at home for the next week, and I need to update and unlock my old iPhone. If I bring it to AT&T would they update it for me? They will unlock it as its eligible, so not worried about that, just worried about how to do restore since its still running IOS 4.something.

What could I do? I'm goin overseas next week and I want to take the phone with me.
Cheers

 

[aziatiklover]

Take it to an apple store. They will do it for u! Or you can do OTA update.

 

[Globug]

It's an old phone. I don't have a Sim card in there. I can't use my current sim as I'm using ip4s and the old one is a 3GS.

But thanks, I'll take it to an AT&T store and see if they will update it/unlock it for me.

 

[Globug]

I forgot to say that it's jailbroken. Will the unlock work without a restore?