iPad: SHSH Blobs will NOT allow local restore of iPad 2 3G

[bird4ever]

Misschien een tip voor de eigenaars van een iPad2 + 3G

Je kan niet meer downgrade naar 4.3.3 of deze opnieuw installeren. Ook al heb je alle SHSH's netjes opgeslagen via Tinyumbrella.

Voor meer info: [iPad2 3G WARNING] Saved SHSH Blobs are not working on iPad 2 3G - SiNfuL iPhone

[XIII]

Ik heb het zelf niet geprobeerd omdat ik die 4.3.5 fix veel belangrijker vind dan een jailbreak, maar zolang Apple (de baseband van) 4.3.4 nog signeert zou het toch via TinyUmbrella 5.00.07 moeten kunnen?

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[bird4ever]

Apple heeft zijn SHSH manier aangepast volgens mij.

I have an iPad 2 3G, what’s the problem?
Your iPad has a modem/baseband that runs a different firmware from iOS. It is being signed as well, but you cannot save the SHSH blobs for it. That is because each time you ask for a verification (when restoring), Apple will create “random” SHSH blobs, so you can’t actually reuse the SHSH blobs. This is a problem, because iTunes will not be able to sign the baseband, the bootrom will refuse to boot and give you a 1004 error in iTunes. Since all previous iDevices had a bootrom exploit, you could use TinyUmbrella and “Kick Device Out Of Recovery” to boot. This is not possible on the iPad 2 since it has the A5 bootrom which is not yet exploited. You will be stuck in Recovery Mode.

Bron:
iPad 2/JailbreakMe 3.0 FAQ | HermanBanken.nl

[XIII]

Ja maar dit dan?

I've updated TinyUmbrella for iPad 2 GSM/CDMA users allowing them to restore 4.3.x without the fear of the recovery loop. Assuming you have 4.3, 4.3.1, 4.3.2, or 4.3.3 SHSHs and restore to one of those versions, TU will allow the restore to complete successfully.

It is important to note that I added this functionality so that iPad 2 users wouldn't be left without a way to downgrade to 4.3-4.3.3. It is also important to note that this functionality will only remain for so long as Apple signs the current firmware (4.3.4). Use it while you can!
Special thanks to @oLunatiko for his help in testing this release!

Bron: The Firmware Umbrella - TinyUmbrella: iPad 2 4.3.x Respite