With final version of iOS 5 now available, there's no surprise that many of you might be looking to upgrade your iPod touch, iPad or iPhone as soon as possible, but there are often reasons not to upgrade, such as the availability of certain jailbreak tweaks and last-minute bugs that might have slipped by Apple's testing. If you have already upgraded, good news: you can downgrade your device back to iOS 4.3.5, 4.3.4, 4.3.3, 4.3.2, or 4.3 in a matter of minutes. Don't know where to start? Then read on.
If you've been paying attention to the news today, you're probably aware of the unexpected release of iOS 4.3.5, an update that allegedly fixes a security issue with certificate validation. If you've backed up a blob from an older version, fear not, you can downgrade very easily.
Bad news for the jailbreakers amongst us. Coming out of the Dev-Team tonight, with a post on the groups blog explaining that Apple's iOS 5 betas are providing clues as to how the company intends to combat saving SHSH Blobs moving forward.
iOS 4.3.3 has been released today by Apple for iPhone 4, 3GS, iPad, iPod touch 4G/3G to fix the much talked about location tracking bug found on devices running iOS 4.x.
iOS 4.3 was released earlier today for iPhone 4, 3GS, iPad, iPod touch 4G, 3G and Apple TV. So if you upgraded to iOS 4.3 beta, and now you want to downgrade back to iOS 4.2.1 or 4.1, follow the instructions posted below to downgrade iOS 4.3 on iPhone 4, 3GS, iPod touch and iPad to iOS 4.2.1, 4.1, 4.0.x.
iOS 4.2.1 was released yesterday for iPhone 4, 3GS, 3G, iPod touch 4G, 3G, 2G and iPad. Even though iOS 4.2.1 jailbreak is possible via Redsn0w 0.9.6b2, but Cydia is still broken which makes the jailbreak pointless for many. It also contains new baseband for all iOS devices which currently makes it impossible to unlock using existing version of Ultrasn0w. So if you upgraded to iOS 4.2.1 and now want to downgrade back to iOS 4.1 / 4.0.2 / 4.0.1, follow the instructions posted below to downgrade iOS 4.2 on iPhone 4, 3GS, 3G, iPod touch and iPad to iOS 4.1 / 4.0.x.
iOS 4.2 was released earlier today. Just like iOS 4.1 and iOS 4.0.2, the new iOS 4.2 at the moment is not jailbreakable. It also contains new baseband for all iOS devices which currently makes it impossible to unlock using existing version of Ultrasn0w. So if you rely on a jailbreak and unlock, stay away from this new firmware until new jailbreak and unlock tools are available for download.
Ok guys let me clear this upfront. I haven't tested this method yet, but by the looks of it, there is no reason why it shouldn’t work. If you have just got a new iPhone 4 or iPhone 3GS (new bootrom) which is on iOS 4.0.2, you can now downgrade to iOS 4.0.1 without having your SHSH blobs saved. This will of course allow you to jailbreak and unlock your new iPhone with JailbreakMe, and patch it with PDF Patch so that you are safe from PDF vulnerability in iOS 4.0.1.
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