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Archive for November, 2011

Downgrade from ios 5 to ios 4.2.1 (Untethered)

November 3, 2011 1 comment

Things need to be prepared :

  1. Tiny Umbrella 5.00.12
  2. GreenPois0n 1.0 RC6.1
  3. fixrecovery-osx for 4.2.1
  4. ios 4.2.1 ipsw

Follow this step :

  1. Make sure that you have backup SHSHs before
  2. Open TinyUmbrella, and start TSS Server
  3. Make sure that you see SHSHs for ios 4.2.1 in List “All saved SHSHs”
  4. Enter DFU Mode
  5. Start iTunes 10.1
  6. Restore ios 4.2.1 by pressing alt button and click Restore button
  7. Find and Select ios 4.2.1 ipsw
  8. Wait until iTunes finish the process
  9. Maybe there will be an error
  10. Enter DFU mode
  11. Run FixRecovery
  12. Wait until iPhone successfully Reboot
  13. run GreenPois0n
  14. Done

Good Luck

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Categories: Iphone, Mac Os