iPhone Upgrade Jailbreak unlocked iPhone to 5.1.1

adhossain

macrumors newbie
Original poster
Oct 7, 2012
7
0
Dhaka, Bangladesh
Hello, I've an iPhone 3GS which have iOS 4.2.1 and it's unlocked by Jailbreak. Currently iOS 6 is available. But I want my device to upgrade to 5.1.1 and Unlock again by Jailbreak :(.
What is the procedure?
I've knowledge on how to use Redsn0w or Sn0wbreez :cool:.
I accidently upgraded my device into iOS 6 and it was locked again. So I sent it to a jailbreaking and unlocking service. They downgraded my device into 4.2.1 and unlocked it via jailbreak
 
Last edited:

Kar.ma

macrumors newbie
Dec 30, 2011
9
0
Hi, I need to accomplish the same task. I never updated my iPhone 4 from purchase day, and now I want to update from 4.2.1 (Jailbreaked with greenpoison) to 5.1.1 (not to iOS 6).
I am collecting informations all over the web to be sure not to mess around with it.
By now I have 5.1.1 ipsw file and greenpoison's absinthe-win-2.0.4 (I use Windows 7). I am going to backup my SHSH with TinyUmbrella, but - provided shsh's backup will be no pain - I don't know which steps I should follow after. How can I install 5.1.1 firmware, should I use the "press Shift button while clicking on Restore in iTunes" trick?
 

adhossain

macrumors newbie
Original poster
Oct 7, 2012
7
0
Dhaka, Bangladesh
The firmware on the device is irrelevant to saving hashes.
But, it is too late to save them since Apple no longer signs this firmware.
Ok, but as I mentioned before, I accidently upgraded to iOS 6 and my nearby service center downgraded it to iOS 4.2.1? I guess they do not have hashes of my device. How they do it?
 
Register on MacRumors! This sidebar will go away, and you'll see fewer ads.