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How to Unlock iPhone Baseband 04.11.08 Using Gevey SIM?

Hello people! Ok, here’s my problem. I have a new iPhone 4 which was jailbroken on iOS 4.3.5 and unlocked with Gevey SIM. I ran a software update yesterday and restored my iPhone to iOS 5. As a result, I am unable to use my Gevey SIM to unlock my iPhone. Just recently, I found out that I should have restored my iPhone to custom iOS 5 and then should have proceeded to unlock. Is there any fix for this? How about downgrading? Thanks a lot!

Asked by: Jeffrey from Vergennes, Vermont

Hello Jeffrey! Sad to say, but there’s no fix for this issue at the moment. Meaning, you will not be able to unlock your iPhone on iOS 5 or any firmware using your Gevey SIM. Downgrading your iPhone back to its previous firmware will not work as well as the baseband of the iPhone is non-downgradable. Once you have updated the baseband of the iPhone, there’s no way you will be able to downgrade it. The only solution to unlock your iPhone 4 on iOS 5, which is not available at the moment, is use a new and updated version of Gevey SIM that has capability to unlock iPhone on iOS 5 firmware. Hopefully folks over at Applenberry have figured out how to unlock iPhone on iOS 5 using their special locking tool.

Anyway, for your kind information, you can check this blog post to know more about creating custom iOS 5 firmware using Redsn0w and unlocking iPhone on iOS with Gevey SIM. Or this guide on how to create custom iOS 5 using Sn0wbreeze 2.8b8.

Gevey SIM iOS 4

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