What is the best site to factory unlock iphone 4 at a decent price?

Hey guys i recently upgraded my iphone 4 to an ios 5.1.1 with a baseband 4.12.01 and I heard there's no solution for unlocking this phone as of now, only way is to factory unlock. So I just want your personal opinions through experience or friends, which site offers a legit factory unlock for the iphone at a reasonable price thanks for the help!

Yes there's only 1 way to unlock this iphone and that is factory unlock. There's no other option.

You can get a factory unlock at
http://attiphoneunlocker.com/
unlocked in Apple's IMEI database

Be careful they are many scam sites. I found this one:

http://www.simunlocks.com/unlock/iphone-at-t-usa

and it is very trustable and has support. I sent all my friends there for unlocking.
They have the best price in the market.