How to unlock an iPhone 4

I have someone who is going to pay me $100+ if I can unlock 3 iPhones he bought off of eBay.

Does anyone here know how to unlock an iPhone 4?  If it helps I believe all 3 iPhone are from AT&T.

Also, how much do you think is fair to charge per iPhone unlocked?

this is in the wrong thread

Where should it be?

mobile devices > iOS

i'm not a mod so i can't move it  

https://www.att.com/deviceunlock/client/en_US/

Done

You just have to slide to unlock. There should be an arrow to indicate where to slide and in which direction.

I can't do that since I'm not an AT&T customer.  I suppose if someone on the forum who is/was in a contract with AT&T would do that for me, that would be a viable option.

0/10 if serious

2/10 if troll.......

I would seriously go on eBay and buy like 3 iPhone 4 Unlocks for $5 and just make $85 from the deal. It will usually take like 2-3 hours to unlock or sometimes, it may take 1-2 business days.