It is now possible to downgrade iPad2 to 4.3.3?

[Jmills87]

Well, I was pretty sure that it was not possible to save a 4.3.3 SHSH for iPad2 while it was being signed but apparently it was because @notcom released a new tool today called TinyCFW which is said to be able to downgrade and iPad2 to 4.3.3 using SHSH. Basically this tool uses a firmware for which you have an SHSH and it stitches the newest baseband into it so that you don't get a baseband panic(error 1015) when downgrading. I do not have an iPad2 with 4.3.3 SHSH saved so I cannot test this but @notcom knows his stuff.

You can download the new tool and read the full article here.

TinyCFW is a simple tool I put together for a friend of mine. He has an iPad2 GSM and has his 4.3.3 SHSH but since Apple is no longer signing 4.3.3, it isn't possible to downgrade to 4.3.3 without getting stuck in a 1015 recovery loop.
What TinyCFW is:

• It will modify an existing ipsw for an ipad2 gsm/cdma or iphone4 gsm/cdma
• It WILL modify the ipsw TO UPDATE YOUR BASEBAND TO THE LATEST!
• It will create an ipsw that you can use with TinyUmbrella AND iTunes to restore to a version of iOS that you have SHSHs for.
• It is primarily for iPad2 with a baseband OR iPhone 4.

What TinyCFW is NOT:

• A jailbreak
• An unlock
• A tool to protect your baseband.
• A tool that will restore your device to any firmware
• A tool for use with iPhone 3GS, iPhone 3G, iPad, or iPhone 4S

The usage is simple. Start the application (double click on the jar or run the .exe file). You must have java and at least 2.5gb ram. (Yes I know. It's a lot. Get over it. I didn't write this to be massively distributed. I wrote this for a friend and am now just sharing it with everyone). Once the window comes up, click the top button and choose an ipsw for which you have SHSHs for. The app will scan it and tell you the firmware and baseband versions in the ipsw you selected and the firmware and baseband versions that will be in the target ipsw when you click the second button. If you're ready, click 'Save Target IPSW'. This will take a minute or two and when it is finished, you will have a file named:



<your original ipsw name>.bbupdate.ipsw.


You can use this ipsw with iTunes and TinyUmbrella to restore your iPad2 GSM/CDMA back to say 4.3.3 (if you have 4.3.3 SHSH).


This is a VERY initial release. I never intended on it being a massively supported tool. It's just something I used in passing. If it helps you great! This functionality will exist in far more robust form when I finally ever release TinyPwn.


Enjoy!

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[Thomasjtsi]

Great info Jared... this should prove quite useful to our iPad 2 users!

 

[f4780y]

I can confirm it works well, and we have a tutorial posted over at our sister site here - TUTORIAL - Use TinyCFW to restore 4.3.3 on iPad2 3G with saved SHSH Blobs

 

[f4780y]

Also worth nothing notcom has just tweeted that the resulting custom firmware CANNOT be used by iPad2 3G CDMA owners due to the way CDMA carriers activate devices (they check the firmare version and also refuse to activate old firmwares).

Therefore TinyCFW should only be used by iPad2 3G GSM owners!

 

[Jmills87]

That's lame!!!!!!!