iPhone JailBreaking and Unlocking 3GS

NttDocomo

macrumors member
Original poster
Jul 8, 2010
91
0
Hi everyone, I posted this earlier under the iPhone forum but was advised to post in here. Currently I would like to unlock my iPhone 3GS and it's currently on 4.0.1 (jailbroken and unlocked). Now I would like to upgrade it to 5.1.1 but I wonder if it's possible as I haven't saved it's 5.1.1 blob (only have up to 4.2.1 blob)?

The phone is with modem firmware 05.13.04 and serial starting with 5K01901. Any help on what are the appropriate steps to get this jailbroken and unlocked on 5.1.1?

Thanks for your comment as any help is always appreciated. Have a great evening :)
 

NttDocomo

macrumors member
Original poster
Jul 8, 2010
91
0
Thanks for all comments, so basically I can't get the blob for 5.1.1 now and thus can't upgrade to 5.1.1 to jailbreak now?

The 3gs will be stuck at 4.3 and can only be jailbreak and unlocked under that version?

I was hoping if there's any way to upgrade, not having iOS 5 is a pain :(

Please if there's any other way, let me know, any help is appreciated, have a great weekend.
 

Intell

macrumors P6
Jan 24, 2010
18,891
400
Inside
The only way you could is if your 3Gs is an old bootrom 3Gs. Those don't need SHSH blobs for the target firmware. But they are more difficult to find.
 

thelatinist

macrumors 603
Aug 15, 2009
5,934
49
Connecticut, USA
The only way you could is if your 3Gs is an old bootrom 3Gs. Those don't need SHSH blobs for the target firmware. But they are more difficult to find.
This is not true. The old-bootrom 3GS has the same signing requirements as the new-bootrom one. The only difference is that it is vulnerable to the 24Kpwn exploit.
 

Intell

macrumors P6
Jan 24, 2010
18,891
400
Inside
This is not true. The old-bootrom 3GS has the same signing requirements as the new-bootrom one. The only difference is that it is vulnerable to the 24Kpwn exploit.
The 24k exploit is able to remove the signing requirement so that the 3Gs can take unsigned SHSH blobs. I've gotten iOS 3.0.0 onto my old bootrom this way with one of the newer versions (May 2012+) of redsn0w.
 

NttDocomo

macrumors member
Original poster
Jul 8, 2010
91
0
The 24k exploit is able to remove the signing requirement so that the 3Gs can take unsigned SHSH blobs. I've gotten iOS 3.0.0 onto my old bootrom this way with one of the newer versions (May 2012+) of redsn0w.
Thanks Intell and thelatinist, just wonder if you can tell me how to tell whether my 3gs has the old or new boot room? Thanks very much :)
 

Intell

macrumors P6
Jan 24, 2010
18,891
400
Inside
Redsn0w can tell you. There's many other ways that can be found via Google. Also, I think the no SHSH old bootrom 3Gs thing was removed from redsn0w. I'm unable to find it in the current version or the iOS 6 version.
 
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