A new SIM called the Gevey Pro will unlock the iPhone 4 on iOS 5, the SIM is only $28 but a warning is issued here.
The Gevey SIM has been said to be illegal, and we here at PhonesReview recommend not using this SIM to unlock the iPhone 4 on iOS 5, your choice and your risk of course, in a nutshell please do not kill the messenger.
If you visit Redmond Pie, a reader sent in some screenshots of his own Apple iPhone 4 being unlocked using the Gevey SIM. This SIM also works without the need of a jailbreak, please visit ApplenBerry for more information.
The Gevey Pro Features: More Stable, Compatible with more Sim, Minor bug Fix, and the package content includes Custom GEVEY Sim Tray, Instructional Booklet and a GEVEY Pro Sim.
Please let us know what you think of the above, will use the new Gevey Pro SIM to unlock your iPhone 4 on iOS 5?
Source – iDB