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Downgrading from 4.3 to 4.2.1 on 3GS

F

flatlined

macrumors member
Original poster
Jun 9, 2010
65
0
I did the update to 4.3 and would like to go back to 4.2.1, Has anyone done it? From what I've read I download a copy of 4.2.1 of for the 3GS, which I Did ,place it on your desktop, while connected and in itunes hold the shift key and press restore, you will be able to browse to firmware, select the copy of 4.2.1 and let itunes restore. Also I downloaded tiny umbrella incase I got an error 1015.

Has anyone else done this?

Thanks
 
You need SHSH blobs saved for 4.2.1, do you have them?

If not, no, you can't.
 
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