TinyUmbrella, is the jailbreak tweak which you can use to save SHSH blobs of your iOS devices for future firmware downgrades. Recently the developers of this App have announced the Updated TinyUmbrella which even supports iOS 5.1 Beta.
Currently there is no possible way to downgrade to any lower version of the iOS, once you go past the iOS 5. Hence even if you have the SHSH blob of your device running on iOS 5.1 beta, you will not be able to downgrade to any lower version as of yet. But we also know how things move in iOS world and maybe the tool to downgrade is just round the corner.
TinyUmbrella Blog :
Before you ask; Yes a solution for the 5.x firmware nonce is being investigated… None of us have a working solution yet though. Hang tight. I have a couple trails and ideas I am trying out for 4.x baseband based restores to avoid 10xx errors. Until then save your signatures as you will never know when they may come in handy…
Also there is no Untethered Jailbreak for iOS 5 devices as yet. However we recommend our readers to save the SHSH blobs for future purpose. You maybe needing them in future while downgrading from a jailbroken state.
This is a Jailbreak tool so you will have to jailbreak your device first. To Jailbreak your device using JailbreakMe click here. To follow our step by step tutorial to jailbreak by RedsnOw click here. To get a detailed step by step tutorial on how to Jailbreak iOS 5, 4.3.3, 4.3.5 and more using RedsnOw 0.9.9 click here.
- How To Downgrade iOS 5.1 Firmware And Save iOS 5 SHSH Blobs [iSHSHit]
- Jailbreak iOS 5 / 5.0.1 On iPhone 4, 3GS, iPad And iPod touch 4G Using Ac1dSn0w Beta 1
- Updated Sn0wbreeze v2.8b9 To Jailbreak Your iOS 5.0.1 Device
- Updated And Faster SemiTether With Bugs Fixed Now Available In Cydia
- Jailbreak Your iOS 5 Device Semi – Untethered [SemiTether]