How to unlock iphone4?

Yes there are so manywebsites which offer to unlock any iPhone whether its 3GS or 4 without jailbreakingit. There are two methods Cut Your Sim and GSM Phone Source charge $169.99 and$179.99, respectively, for remote iPhone unlocking.

In both cases you supplyyour phone's IMEI number then wait a couple days for an e-mail confirming thatthe process is complete. It's that simple. iPhonehas been held back by limited customizability, text message privacy issues,arbitrary data restrictions, and a lack of true and Installer.

There are somany softwares that help in unlocking your device like Cydia and Pwnage tooland to know the complete process about how to unlock your iphone 3gs you canvisits the sites like iphonehacks.com, appleiphonereview.com and gizmodo.com asthey provide step by step process of unlocking the iphone.