Upgrade To iOS 5.0.1 Without Upgrading Your Baseband Using Redsnow Tool

Apple has released the iOS 5.0.1 version recently and now everyone is busy upgrading their devices to this latest OS as unlike iOS 5.0, one can have an untethered jailbreak on this newer version. But for many there is a concern related to the baseband. Many readers out there do not have unlocked device so if they upgrade to the latest iOS it would upgrade their device’s baseband as well.

If a person has changed his/her device’s baseband so as to use SIM cards of different carriers on a factory locked device, there is a certain outcome that on upgrading the baseband with the iOS 5.0.1 the device will stop accepting different SIM cards. Also there is a possibility that your device’s hardware gets damaged on upgrading in case you have previously unlocked your device using ultrasnow and are on iPad baseband.

Through this post we will give you a solution to upgrading your device to iOS 5.0.1 without changing your baseband. Or you can also say that you can upgrade the iOS while preserving your baseband.

Guide To Upgrade To iOS 5.0.1 Without Changing Baseband

  • First of all you need the stock IPSW file of the latest firmware for your device which you can download from here
  • Now download the Redsnow tool
    • Mac users download from here
    • WIndows users download from here

NOTE: Before you start creating the CUSTOM IPSW using redsnow tool make sure your computer is not running any programs and all the RAM is free since the process mentioned below will eat up a lot of ram and it is possible that it fails. I would recommend you restart your computer and then start with the process.

  • Once you have downloaded both the files, open Redsnow tool

Redsnow preserve baseband

  • Now go to the extras section and click on CUSTOM IPSW.

Redsnow preserve baseband 1

  • On doing so an explorer window will open where you to navigate to the stock IPSW file you downloaded and select it.

redsnow bseband preserve 3


  • Click Open and the tool will give you a message where you need to select whether your device is a new model or an older one depending on the serial number located inside your stock iDevice settings.

redsnow bseband preserve 4

  • Click the appropriate button, Yes or No, and the app will start creating the new Custom IPSW which will preserve your baseband. It will take a few minutes and will create a new IPSW.

redsnow bseband preserve 5

  • At last the custom IPSW will be saved in the same directory where the stock IPSW file is present but will have NO BB as the initials.

redsnow bseband preserve 7

  • Now when you restore your device using iTunes select the IPSW file starting with NO_BB and DO NOT use the stock IPSW file. When iTunes completes restoring your device you will be glad to know that you are now running iOS 5.0.1 and retain your old baseband.

Feel free to ask if you have any questions and i hope this post helps you.

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