Apple has blocked the use of Gevey SIM in the recent update to the iOS 5 beta, so there’s noย reasonย to update your iPhone to iOS 5 beta if you’re an unlocker. If you don’t know what Gevey SIM is, Gevey SIM isย currentlyย the only way of unlocking the iPhone on any baseband, it can unlock BB 01.59.00, 02.10.04, 03.10.01, 04.10.01 and 04.11.04. This method ofย unlockingย works on any iOS baseband,ย until now, iOS 5 Beta 2.
Theย confirmationย of this comes from jailbreak hacker MuscleNerd whoย tweeted that Apple closed Gevey interposer hole in iOS 5 Beta 2 rather than waiting for the final release.
it’s surprising Apple closed Gevey interposer hole in b2 rather than waiting until final (maybe they were under pressure)
So you should wait and be very careful if you’re using an unlocked iPhone. I would stay away from any updates unless you’reย officiallyย unlocked.