Sunday, March 18, 2012

How To Upgrade Your iPhone On iOS 5.1 Without Updating Your Baseband

How To Upgrade Your iPhone On iOS 5.1 Without Updating Your Baseband - Complete Guide

Earlier this month, Apple released the new iPad along with iOS 5.1 update for iPhones , iPads and iPod touch 3rd and 4th generation. You can download and install the latest iOS 5.1 on your Apple device either by OTA update or by connecting your iPhone-iPad-iPod to iTunes and launching update. Some features of iOS 5.1 include Siri in Japanese language and some other minor performance updates. What's not good about directly updating your iOS device to 5.1 is that your baseband gets upgrated too. If you rely on Ultrasn0w unlock then you should never directly update your iPhone via iTunes. In this section we'll take you though the process of updaing an iPhone without updating the baseband so that it can be unlocked.

updating iPhone to ios 5.1 using redsn0w
If you want to create a backup of your iPhone data before upgrading to iOS 5.1 then follow this guide. 

Before we begin with the guide make sure you download and save the following on your desktop.

  • Latest version of Redsn0w : Download link :
  • iOS 5.1 : Download link :
Once you have downloaded Redsn0w and iOS 5.1, place them in one folder for your convenience. Extract the redsn0w archive and you should be able to see 5 extracted files from that archive like the below screenshot.

how to update iphone without upgrading baseband using redsn0w

Launch Redsn0w in Administrator mode by righ clicking on redsn0w and selecting Run as administrator. Once redsn0w is launched, select the second option Extras. In the Extras menu, select custom iPSW and point redsn0w towards the download iOS 5.1 firmware. Check the screenshots below

update your iphone on lates ios 5.1 using redsn0w

how to save baseband and upgrade iphone to ios 5.1

how to upgrade iPhone 4 to ios 5.1

Now redsn0w will cook a custom iPSW file for your iPhone which will prevent your baseband from getting upgraded. This process usually takes some time so sit back and relax until the cumtom iPSW is ready.

how to update iphone to 5.1 using redsn0w

redsn0w can update your iphone without upgrading your baseband

Once the custom iPSW is ready, you can proceed with updating your iPhone with the following methods.
In the extras menu, select Pwned DFU. This step is very IMP and should be done exactly as mentioned. Its very important to get an iPhone into Pwned DFU mode to install cumtom iPSW. Follow the on screen instructions carefully.

Instructions For Getting Into DFU Mode

  • Switch off your iPhone
  • Hold the power button for 3 seconds
  • Now, without releasing the power button also press and hold the home button for 10 seconds.
  • Without releasing the home button, release the power button but continue holding the home button until your device enters DFU mode and you redsn0w automatically detects it.

update iphone to 5.1 using redsn0w by saving your baseband

software update iphone

updating my iphone software

iphone 4 untethered jailbreak ios 5.1

Now redsn0w will use limera1n to get your iPhone into Pwned DFU mode. 

software update for iphone

software update for iphone 3gs

Once done, launch iTunes to install the custom iPSW that we just created using redsn0w. As soon as you launch iTunes, a pop-up alert saying - "iTunes has detected an iPhone in recovery mode" would appear. This is supposed to happen so don't panic :) Select your iPhone and then hold down the shift key and click restore and select the firmware that we created using Redsno0w : NO_BB custom IPSW. Your iPhone will now be updated to latest iOS 5.1 without your baseband getting upgraded.

update for iphone

how to update software on iphone

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Anonymous said...

THANK YOU! I've been trying for almost 48 hours straight to figure this out! I'm SO thankful for your assistance!!!

Anonymous said...

just back from holiday and disaster strikes... can't lose all these photos, please help.

2 year old iphone 3gs 3.1.3 jailbroken (many moons ago). suddenly entered recovery mode - then dfu (apple logo). managed to exit back to recovery mode briefly before stupidly running pwned dfu with snowbreeze 2.9.3

is there any hope to get it back to recovery mode (or normal dfu) to try fix recovery/recboot/tinyumbrella? or upgrade without losing everything since last backup?

any suggestions greatly appreciated.

Ehhmad said...

To get it back into recovery or normal boot, simply press and hold power + home button for 10 seconds.

This would reboot your device and if your device has any issues with booting, it should be in recovery mode and you can try fix recovery.

Help Links

Ahmed Ardal said...

I get error 1602 from iTunes :(

Speedo7 said...

Me too, error 1602 :(

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