How to Upgrade Your iPhone to iOS 5.1 Without Updating Your Baseband (Win)
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Posted March 8, 2012 at 8:52pm by iClarified
These are instructions on how to upgrade your iPhone 4 GSM or iPhone 3GS to iOS 5.1 without updating your baseband using Windows. This will maintain the potential to unlock if you are on a supported baseband.
Step One Download the latest version of RedSn0w from here and place it in a Pwnage folder on your Desktop.
Step Two Download the iOS 5.1 firmware for your device from here and place it in the same Pwnage folder.
Step Three Extract the RedSn0w archive then right click the RedSn0w executable (from within the extracted folder) and select Run as Administrator to launch the application.
Step Four Click Extras from the RedSn0w main menu.
Step Five Click Custom IPSW from the Extras menu.
Step Six Select your iOS 5.1 firmware from the Pwnage folder on your Desktop and click Open.
Step Seven RedSn0w will now customize an IPSW file for you.
Step Eight RedSn0w will inform you once your IPSW has been created successfully. Click the OK button.
Step Nine Click Pwned DFU from the Extras menu.
Step Ten Connect your device to the computer via USB and power it off. Then click the Next button to continue.
Step Eleven Hold down the Power button for 3 seconds.
Step Twelve Without releasing the Power button, also hold down the Home button for 10 seconds.
Step Thirteen Without releasing the Home button, release the Power button BUT KEEP holding the Home button until your device is detect in DFU mode.
Step Fourteen You device will now be exploited with LimeRa1n.
Step Fifteen Once its done you will be in Pwned DFU mode.
Step Sixteen Launch iTunes by clicking its icon in the dock.
Step Seventeen Select your device from the list on the left, then hold down the Shift key and click Restore.
Step Eighteen Select the NO_BB custom IPSW from the Pwnage folder on your desktop and click Open.
Step Nineteen You iPhone will now be upgraded to iOS 5.1 without updating the baseband.
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I have Iphone4 with ios 4.x.x, cand I still upgrade it to 5.1.1? Itunes gave me 3194 error (Apple not signing old ios). Can I upgrade ios without using itunes and use redsn0w IPSW restore? or I have to use itunes and upgrade to the current IOS and downgrade back to 5.1.1?
Hi all,
I have done all the process. Once I have done the step eighteen, iTunes start to extrac the IPSW and when it finishes, iTunes tells me something about a mistake 3194.
Does anybosy something about this error?
Thanks a lot,
iPhone 3gs.
In going through the procedure, I got an error 10 when restoring in iTunes. The phone then hung at the progress bar. I did a hard reboot and then it went into a recovery loop. I cant get out. Tried with Redsn0w and Tiny Umbrella but neither work. I tried Recovery Fix in Redsn0w but it wants me to enter DFU - I CANT GET OUT OF RECOVER TO ENTER DFU!
Procedure history:
Started with 3gs on 4.3.5 bb 5.16.02
Downgraded to 4.1 and upgrade bb to iPad 6.15: http://forums.macrumors.com/showthread.php?t=1211718
Downgrade baseband to 05.13.04: http://blog.iphone-dev.org/post/25350690843/0615-fun
Then I tried to upgrade to iSO5.1 without updating baseband (This tutorial on iClarified). And that's when I got the error 10 as noted above.
When creating the custom IPSW file, I was warned that if I have the newer iPhone 3gs, I would need SHSH Blobs to complete the restore? Is this still the case? If so, how do I go about getting such blobs?
I am using my USA AT&T iphone in India, which is locked by AT&T. Before I upgrade it to iOS 5.1 using this tutorial, just want to know whether it will ask for activation after upgrade. I have read somewhere that after you upgrade iOS we need career's sim card to activate it.
Please let me know if anybody have any idea.
my (iPhone 4) is in iOs 4.3.5 and it is Looked on sfr and I unlook by GEVEY sim. I want upgarde to 5.1.1 and I want kept unlook GEVEY with my (my baseband: 4.10.01) >>>> if i upgarde it without Changing My baseband then jailbreak it work or not my GEVEY <<<<< <
Sadly I've updated my iPhone 3GS to iOS 5.1 now it only showing me options to select: Language/Country/wifi/network
But my iPhone was jailbroken (not 100% sure I got it second hand).
I can't connect to any wifi as there is nothing like this in Bangladesh(where I'm now). The iPhone gives me other options to set my network using iTunes and after taking a while iTunes keeps saying: ""there is no sim card installed in the iphone you are attempting to activate""
What to do I even can't use the phone.
Please help me
Has anyone really tested to run an iPhone under these conditions?
1) iOS 5.1 JAILBREAKED
2) Preserved Baseband
3) Unlocked using Gevey SIM
I have already done it and IT DOES NOT WORK JAILBREAKED (the wellcome message appears, but the "No SIM Card Installed" message is no more displayed). It only runs with iOS 5.1 without a jailbreak.
Nobody has answered that question to me. So, if you want to upgrade to iOS 5.x, unlock using Gevey and enjoy having a JAILBROKEN iPhone, DO NOT UPGRADE TO IOS 5.1!!!
Hi sadly I've updated my iPhone 3GS to iOS 5.1 now it only showing me options to select: Language/Country/wifi/network
But my iPhone was jailbroken (not 100% sure I got it second hand).
I can't connect to any wifi as there is nothing like this in Bangladesh(where I'm now). The iPhone gives me other options to set my network using iTunes and after taking a while iTunes keeps saying: ""there is no sim card installed in the iphone you are attempting to activate""
What to do I even can't use the phone.
Please help me
Hello all,
I have an iPhone 4 baseband 03.10.01 working with Gevey. I have just upgraded to iOS 5.1 using redsn0w.
Before jailbreak, I have successfully unblock my iPhone with Gevey script (dial 112, wait message "No SIM card installed" and so on).
The problem is: when I jailbreak my iPhone, the "No SIM card installed" message is never displayed. I dont know what else I can do. Someone can help me?
Thanks
Eder
I have a 3gs old bootrom 00.16.00 bb jailbroken and unlocked using Redsn0w and Ultrsn0w.
Am I correct that I can use the above to update to 5.1 and still have untethered Jailbreak and Unlock?
Can I downgrade to 5.0.1 if I have saved the proper files?