Hello guys, I am getting multiple errors when downgrading my iPhone 4 back to iOS 4.3.3 after accidentally updating it to iOS 4.3.5 last week. I am downgrading it using already saved iOS 4.3.3 SHSH blobs and the latest version of TinyUmbrella, however, iTunes is throwing error 3194 and error 21 when downgrading it. Anyway, I am also planning to unlock my device. I have baseband 4.10.01 installed and have already downloaded the new version of Sn0wbreeze. Thanks in advance.
Asked by: Gave from Tallahassee, Florida
You should be note that jailbreaking an iPhone, iPad, and iPod Touch using custom IPSW requires a full firmware restore using iTunes. iTunes error 21 will occur if you are trying to restore custom IPSW via the regular recovery mode. To fix this issue, you must put your iPhone into DFU mode. You can follow this guide on how to fix iTunes error 21.
Anyway, you will not be able to unlock your iPhone 4 from its carrier even after fixing these errors due to the fact that your iPhone is running on unsupported baseband. And there’s no need to jailbreak your iPhone using Sn0wbreeze or PwnageTool as these jailbreak tools were designed to preserve the unlockable baseband of an iOS device. Anyway, I would recommend you to downgrade your iPhone and restore it to stock iOS 4.3.3 and jailbreak it using JailbreakMe 3.0. After jailbreaking your iPhone, you can unlock it using Gevey SIM Pro. Hope this help!
