Did you just buy an off-contract iPhone 5? Doing a full restore would unlock it. It’s that easy.
Unlocking an unsubsidized iPhone 5 is as simple as doing a full restore in iTunes. Once you’ve purchased your iPhone 5, it will be marked as “unlocked’ in Apple’s database which stores information of every iPhone ever produced by Apple.
Based on the report on TechCrunch:
We have confirmed the process with AT&T’s technical support and successfully tried it with a T-Mobile SIM card. After restoring the device in iTunes, the user is prompted with the usual unlocking message: “Congratulations, your iPhone has been unlocked.”
Once you see this message, you can confirm that the unlock by inserting a non-AT&T nano SIM card. In short, the steps are 100% identical as the official unlock we offer for AT&T iPhone – even if it’s still under contract.
An iTunes restore is always needed to apply an unlock once it has been approved by AT&T (or other carries) but it can also be done by removing the files in the ‘lockdown’ folder or deactivating your iPhone with redsn0w, if you want to avoid doing a full restore.
Oh did you know that Verizon iPhone 5 is sold unlocked?