How-to? Upgrade 3GS iOS 4.1 JB to iOS 5 JB

[fQxhUYESQmLDr]

Hi!


I have an iPhone 3GS 32gb:


Modem Firmware: 06.15.00
Model: MC133B
Serial Number: **9425S13**


The phone is currently jailbroken and unlocked at iOS 4.1 (8B117).


How can I upgrade the phone to iOS 5.X, to a untethered-jailbreak-ready and unlock-ready state?


I have tried an iTunes standard update on a dozen different computers but I always get some sort of error; usually 'this device is not eligible'.


Please help!


Thanks,


Francis Drake

 

[Jmills87]

Unless you have your SHSH blobs saved for the firmware you are trying to restore, you will not be able to restore an older firmware.

 

[fQxhUYESQmLDr]

Thanks for replying, but why would I want to restore an older firmware? I mean, I am trying to upgrade, right?

Unless you have your SHSH blobs saved for the firmware you are trying to restore, you will not be able to restore an older firmware.

 

[Jmills87]

Any firmware other than 5.1.1(which does not have an untethered jailbreak) is considered older firmware.

 

[fQxhUYESQmLDr]

Any firmware other than 5.1.1(which does not have an untethered jailbreak) is considered older firmware.

I get it! Thanks!

So (if I sacrifice and go untethered) what is the procedure in upgrading to 5.1.1 in my case?

 

[Jmills87]

To upgrade to 5.1.1 you would first need to make a custom firmware(which Im not even sure there is a tool to make a custom 5.1.1 firmware yet) and then you would need to shift+restore it in iTunes.

 

[sidhantchadha]

Use Shift+Restore and upgrade in DFU mode from iTunes after downloading the custom IPSW firmware file.