How to unlock an iPhone without a computer?

How do you unlock an iPhone without a computer?

It's possible to perform a hard-reset on an iPhone by pressing a combination of keys to initiate the inbuilt hard-reset feature.

Note: This will erase everything stored on that iPhone before the OS is restored back to default.

There's only one way of unlocking iPhone without actually typing in the code and that is going on iTunes and restoring.

Do you want to unlock an iPhone from carrier lock? Without a computer, you can't get online service. Better, you can go for any of the computer shop and get Remote unlocking method from any of the online vendors like SimpleUnlocking.com to unlock your iPhone. I think its an ideal way to unlock your iPhone.

You can't. You need to have access to iTunes to get the unlock most of the time. If you need help with getting the phone factory unlocked, mail me for references.