What iOS version shall I Downgrade my iPhone 3G to?

edholmes

macrumors newbie
Original poster
Jul 25, 2012
5
0
Basically I'm getting a new one soon but this one (jailbroken iOS 4.2.1) is EXTREMELY SLOW. So i will live without the jailbreak for a few months but which iOS version is best for this on an iPhone 3G?
 

batting1000

macrumors 604
Sep 4, 2011
7,223
1,397
Florida
Basically I'm getting a new one soon but this one (jailbroken iOS 4.2.1) is EXTREMELY SLOW. So i will live without the jailbreak for a few months but which iOS version is best for this on an iPhone 3G?
You can't downgrade to a lower OS version unless you have SHSH blobs saved for a previous OS version as Apple is no longer signing previous versions of iOS.
 

PsstGreek

macrumors 68040
Oct 21, 2010
3,774
58
Tampa Bay
3.1.3 would be the best option for you.

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You can't downgrade to a lower OS version unless you have SHSH blobs saved for a previous OS version as Apple is no longer signing previous versions of iOS.
With a 3G yes, the OP can. The 3G can be downgraded to any firmware, 3.1.3 or later.