How can I downgrade 3.10.01 to 1.59.00 Baseband iPhone 4 ? We have been asked the question in dozens of mails on Limera1n.cc. For who don't know that 1.59.00 baseband is the last unlockable baseband on iPhone 4 with ultrasn0w.
Is Downgrade 3.10.01 to 1.59.00 Baseband iPhone 4 Possible ?Unfortunately the answer is no, there's no way to downgrade 3.10.01 to 1.59.00 baseband on iPhone 4, moreover iPhone Dev-team didn't even promise to work on such task. iPhone Dev-team is only work on downgrade 6.15.00 baseband for iPhone 3GS and iPhone 3G only. So don't trust anyone tries to sell you a product to downgrade your 3.10.01 baseband on iPhone 4.
Downgrade 3.10.01 to 1.59.00 Baseband iPhone 4 is not possible - What Can I do ?Unlocking iPhone 4 on baseband 3.10.01 you have to use Gevey SIM which is a perfect solution for your case and is being sold with reasonable prices. On the other hand, Pod2g, the well-know iPhone hacker is now involved in iPhone 4 unlock on higher basebands. Pod2g has received all paper from MuscleNerd related to unlock iPhone 4 project. So we expect to see a new version of ultrasn0w to unlock iPhone 4 on 3.10.01 baseband.
Update: Now you can make iPhone official factory unlock, you can check the details from here