Is it possible to revert back to a previous software version?

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hey, had question guys , appreciate help. downloaded new 4.2.10 update verizon iphone , found out there no untethered jailbreak update. there possible way revert 4.2.8? hope so....

help! : )
 

only if have shsh saved.
 


Forums iPhone, iPad, and iPod Touch iPhone iPhone Tips, Help and Troubleshooting


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