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Sunday, December 18, 2011

How To Create A Custom Firmware For iPad 2 & iPhone 4 To Downgrade At iOS 4.3.3 With TinyCFW Alpha

As you know that folks around have updated to iOS 5 and are no more able to downgrade due to certain reasons such as no SHSH blobs and one of the main epic reason is that Apple is no more signing iOS 4.3.3 and you are not able to downgrade so for that @notcom a.k.a Semaphore the developers of the famous SHSH blobs saver, TinyUmbrella today released a new tool in the market named TinyCFW Alpha to downgrade. He basically created this for his friend but made it public.

The following text is from his blog post

TinyCFW: Create a custom IPSW for iPad2 and iPhone4

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!
Well folks its in beta stages for sure and is working for some and not for some and will give the following error

Download TinyCFW Alpha for Windows from here.
Update 1: @notcom has updated about the above error in his latest tweet
Update 2: For the folks for whom it was not working due to the above issue, we have got you the way out. Follow the steps below
Go to
  • Start                     }
  • Control Panel   } go to the properties of my computer by right clicking the My Computer logo on the desktop
  • System                }
  • Advanced System Settings (Placed at right)
  • A new windows will open where you will see Environment variables
  • There click “Add” and add the followings
  • Variable Name: _JAVA_OPTIONS
  • Value Of Variable: -Xmx1g

















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