How to unlock iPhone 4 baseband 04.12.05 ios 6.1.3? - 1

How to unlock iPhone 4 baseband 04.12.05 ios 6.1.3?

I bought this iPhone from a friend right before he moved and he doesn't have a receipt and and it's lock to AT&T. But for them to unlock you need a receipt and I called my friend and he dosent have it. Please is there any way I can unlock it I want to use tmobile.

My friend said to use this link http://phonerebel.com/unlock-any-iphone/# but I don't want to use a PayPal and i just want to know if i can use a prepaid Visa card but it asked for an expiration date. Does the card expire. I'm buying the card at a local gas station for 20$ I saw it the other day so please help?

You don't need a paypal account. If you click where it says something like 'i don't have a paypal account', you can type in the prepaid card info/debit/credit card without a paypal account.

Instead Iphones can be easily unlocked using remote unlocking method. This service will be available at any commercial vendors online like Mobile-unlocker.com.Once unlocked you can access with any carrier… Check the payment option there…