Preserve Your Baseband While Updating iOS 5 So You Can Unlock Using Ultrasn0w [HOW TO]


by casey on October 14, 2011

You need to install iOS 5 public version on your iPhone 4 or iPhone 3GS and also want to preserve your baseband from updating ?? Of course preserving baseband is important for you if you want to unlock your device with Ultrasn0w. Following is the tutorial to install iOS on your iPhone 4 or iPhone 3GS while you prevent your baseband from updating.

Sn0wbreeze and PwnageTool helps you to complete this task. PwnageTool is now merged into Redsn0w jailbreak tool which simply means Redsn0w now has the ability to create custom firmware to preserve your baseband from updating. Follow the guide below.

How To Upgrade to iOS 5 while Preserving Baseband


redsn0w IPSW ios 5


  • Open the folder you created on desktop and open launch the Redsn0w application.
  • It will open the following screen. Now you need to press the EXTRAS button.
jailbreak 5.0


  • It will open the following screen. Now you have to click on CUSTOM IPSW button.
tethered jailbreak ios 5


  • Now browse the iOS 5 firmware that you have downloaded and placed inside the folder on your desktop.
custom ipsw ios 5


  • Redsn0w will now start cooking the custom firmware.
custom ipsw ios 5 1custom firmware ios5


  • Once it completes the process, it will show you the following screen. It shows the location of new firmware file it has created which is the same folder. The name of the new firmware file it has created starts with NO_BB. Press OK on this Windows.
custom firmware created


  • Click on the PWNED DFU option on Redsn0w.
tethered jailbreak ios 5


  • Put OFF your iOS device and connect it with your computer.
  • Make sure its OFF and connected to your computer and then press the NEXT button.
ios 5 jailbreak


  • Redsn0w will now assist your to enter your device in DFU mode.
  • Hold down both the HOME button and POWER button for almost 10 seconds on your iOS device.
  • Let go the POWER button and keep holding the HOME button until your device is detected in the DFU mode.
  • It will show you a DONE message once its completed.
jailbreak ios 5 DFU mode

DFU redsn0w

enter dfu

entered into DFU

STEP 10:

  • Open�iTunes 10.5�software.
  • Hold down OPTION button on keyboard and press RESTORE button on iTunes and select the custom firmware from the folder you created on desktop. MAKE SURE you select the custom firmware that starts with NO_BB.
  • Your device will be updated to iOS 5 firmware.
iTunes ios5.0
CONGRATULATION! You have successfully upgraded to iOS 5 while preserving your baseband. NOTE that the above process has nothing to do with the jailbreak. The above guide is just to upgrade to iOS 5 while preserving baseband. To jailbreak your device now, you can follow the below guide.

How To Jailbreak iOS 5 After Upgrading to iOS 5 While Preserving Baseband

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  • uzmAN

    Before i update, I want to know, Should my cydia say SHSH blob 5.0 because currently it says 4.1 & 4.3.5 only.
    If it should than how do i create a blob for iOS 5 before updating? or can i update without having one?

    • casey

      You should save SHSH blobs of the firmware FROM which you are upgrading to iOS 5 so you can go back when ever you want! So what you need to do is to upgrade to iOS 5 simply following above guide! To Save SHSH blobs, its necessary to first have it in your iOS device!

  • Bill wright

    Hey team, just wondering if I semi teather my iPhone 4 with 5.0.1 firmware can I by any chance still get mxtube, five icon dock, and 3G unrestrictor???

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