While we are looking for unlocking solution for 04.08.11 and 04.12.01 basebands here I’ll show you haw to unlock iPhone 4 iOS 5.1.1 using Gevey Sim for 04.10.01 and lower. Also I’ll show you the method which you can use to fix No Service. We received many emails from our visitors that complaints on No Service issue when using Gevey Sim. They wrote that they had tried to unlock iPhone 4 iOS 5.1.1 using Gevey Sim but got No Service. And everything the developers did was unsuccessful.
FuriousMod is a tools that helps your iPhone to work with Gevey SIM on iOS 5.0 or iOS 5.0.1. It doesn’t support any new basebands, so it’s not the baseband 04.11.08 unlock or something else method, but this tweak can make your life easier. FuriousMod works with Gevey Ultra but may be good for other Gevey cards as well and it frees you from dialing 112 every time your iPhone reboots or its battery dies (ouch). There are lots of questions of how to use FuriousMod and where to get one. Threads on FunkySpaceMonkey, JailbreakQA and modmyi give some answers on that question (MacRumors is a winner in that competition). But we decided to write this article to give you the full picture on how FuriousMod
This guide is for those people who accidentally updated their iPhone 4 to iOS 5.1 and lost their unlocks via Gevey SIM unlock solution. There is good and bad news. There’s no iPhone 4 unlock for 04.12.01 baseband but there’s a way out. iOS 4.3.5 the last of iOS 4-x series, is still supported by Apple. That means that you can downgrade to 04.10.01 which can be easily unlocked by Gevey SIM.
If you just bought a Gevey sim and not sure how to use it then this post is for you. It’s a tutorial and some useful tips on How to unlock iPhone 4 using Gevey Sim. First of all, if you use Gevey sim and you’d like to upgrade to the newest iOS 5.0.1, do not ever perform this through iTunes, because it will upgrade your baseband and kill the unlock.