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Create iOS 5.1.1 Custom IPSW on Windows & Mac Using Redsn0w 0.9.12b2

For those who are relying on unlocking solutions such as Ultrasn0w and Gevey SIM will know that every release of a new firmware version is certainly a tricky affair. Updating your firmware version means you'll update your baseband as well thus losing your unlock in the process. You'll have to wait until the updated baseband becomes supported which generally takes forever. In this case, you will need to create a custom IPSW and use it to update your iOS version without losing your unlockable baseband. Here's How to Create iOS 5.1.1 Custom IPSW on Windows & Mac Using Redsn0w 0.9.12b2.

iOS 5.1.1 Custom IPSW Using Redsn0w

Steps on How to Create iOS 5.1.1 Custom IPSW on Windows & Mac Using Redsn0w 0.9.12b2:

  1. First you will need to download the stock iOS 5.1.1 IPSW files.
  2. Launch Redsn0w 0.9.12b2. Find the download links for the tool here.
  3. iOS 5.1.1 Custom IPSW Launch Redsn0w

  4. Click Extras and on the next screen look for the Custom IPSW option. Click it.
  5. iOS 5.1.1 Custom IPSW Custom IPSW

  6. You will be asked to browse for the IPSW. Select the iOS 5.1.1 IPSW you have downloaded in Step 1.
  7. iOS 5.1.1 Custom IPSW Select IPSW

  8. Redsn0w will now start the custom IPSW creation process and you should receive a message indicating that the process has been successful.
  9. Redsn0w Creating Custom IPSW
    iOS 5.1.1 Custom IPSW Creating Custom IPSW

  10. Now you will need to place your device in Pwned DFU Mode. In this case you can use Redsn0w's built-in Pwned DFU option. Click Extras > Pwned DFU.
  11. iOS 5.1.1 Custom IPSW Pwned DFU

  12. Make sure that your device is plugged in and switched off. Click Next and follow Redsn0w's onscreen instructions.
  13. iOS 5.1.1 Custom IPSW Pwned DFU Instructions

  14. Once your device is successfully placed in Pwned DFU mode, proceed to launch iTunes.
  15. Launch iTunes

  16. Select your device from the side panel and click the Restore button while holding Shift (Windows) or Alt/Option (Mac). Browse for the iOS 5.1.1 custom IPSW we've made in Step 5, NOT the stock IPSW.
  17. iTunes Restore
    iTunes Restore Message

  18. iTunes will now restore your device to your iOS 5.1.1 custom IPSW.
  19. iOS 5.1.1 Custom IPSW iTunes Restoring
    iTunes Restore Complete

And that's pretty much it! You should now have upgraded to iOS 5.1.1 and also preserved your baseband in the process using iOS 5.1.1 custom IPSW.

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    ChiefRA4 years, 2 months ago

    If it doesn’t work from the first try on your iPhone 4 (it gives you the error code 11 or error code 3194) just disconnect the iPhone from the cable, and reconnect it again (it won’t get out of Pwned DFU mode) and try again (while holding down SHIFT) to click on Restore button on iTunes: it will start (mine, started only on the 5th attempt) and will succeed.