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How to restore to unsigned firmware?

J

Jimmy Guphanti

macrumors 6502
Original poster
Mar 29, 2011
341
8
I am currently in possession of an iPhone 4 Verizon CDMA running 4.2.8 jailbroken. For undisclosed reasons I am going to restore it to 4.2.10 which is the latest firmware for this iPhone. Later on, I will need to downgrade it to 4.2.8 to jailbreak it. What steps to I need to take before I restore it such as backing up certain "blobs" or what ever they are so that I can downgrade easily at a later date. As much detail as possible since I am not exactly a Steve Jobs or a comex when it comes to these things.
 
use tiny umbrella or cydia to check if you have blobs for 4.2.8 saved. If you don't I reccomend you leave it as-is as you won't be able to downgrade.
 
Jimmy Guphanti said:
I am currently in possession of an iPhone 4 Verizon CDMA running 4.2.8 jailbroken. For undisclosed reasons I am going to restore it to 4.2.10 which is the latest firmware for this iPhone. Later on, I will need to downgrade it to 4.2.8 to jailbreak it. What steps to I need to take before I restore it such as backing up certain "blobs" or what ever they are so that I can downgrade easily at a later date. As much detail as possible since I am not exactly a Steve Jobs or a comex when it comes to these things.
Click to expand...

If you didn't jailbreak 4.2.8 when it was still being signed, you don't have blobs. What you are planning on doing simply does not make any sense. Getting rid of your jailbreak, upgrading, and downgrading again just to re-jailbreak just doesn't seem logical, unless you're trying to do something shady :)confused:).

Once you upgade to 4.2.10, you will not be able to downgrade without blobs.

There is one solution for Windows users called iFaith but it's been known to lead to recovery loops, and I don't trust it.
 
The one thing I can think of that would explain what you are trying to do is that you are going to the apple store for service and you don't want it jailbroken. Is that the case?
 
sbddude said:
The one thing I can think of that would explain what you are trying to do is that you are going to the apple store for service and you don't want it jailbroken. Is that the case?
Click to expand...

'Undisclosed reasons' almost makes it sounds like he's doing something that may make us not want to help him. :D
 
I do have the SHSH blobs backed up in tiny umbrella. The reason is that I am swapping phones with a friend who wants it to be not jailbroken and restore/ wiped clean, and if in the event we swap back, I need to have jailbreak tethering and all of the other goodies.
 
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