How do you downgrade from 4.2.10 back to 4.8.10?

Discussion in 'iPhone' started by metzy25, Aug 12, 2011.

  1. metzy25 macrumors 6502a

    metzy25

    Joined:
    May 7, 2011
    #1
    Wirelessly posted (Mozilla/5.0 (iPhone; U; CPU iPhone OS 4_2_8 like Mac OS X; en-us) AppleWebKit/533.17.9 (KHTML, like Gecko) Version/5.0.2 Mobile/8E401 Safari/6533.18.5)

    I have a iPhone 4 and was looking into how too do this? Is it possible? And how do I do it?
     
  2. jonrando macrumors 6502a

    Joined:
    Jun 22, 2011
    #2
    There is no iOS 4.8.10.

    If you meant 4.2.10, then you can't unless you saved your SHSH blobs because Apple stopped signing previous versions of iOS.
     

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