Avoid iphone-unlocker-pro.com or easy-iphone-unlocking.com is a SCAM I have a proof, they don't delivery what they promise, I'm fighting with my credit card to recovery my US$29.99.
Don't buy from them, they claim to be able to unlock the iPhone 4 and this is not true, they can't!!
i bought from them, the iPhone 3GS UNLOCK service for $29.99 and i receive the same software from DEV TEAM (for free) don't buy from iphone-unlocker-pro.com and easy-iphone-unlocking.com
Avoid these sites, they are scam artists, the site looks nice and authentic, but it is a trap!