Downgrade from iOS 4.3.5 to 4.2.1

Discussion in 'iPhone' started by john5171, Aug 21, 2011.

  1. john5171 macrumors newbie

    Joined:
    Aug 21, 2011
    #1
    Hi,

    I am trying to trade phones with my friend who has a 3g with ios 4.2.1, while I have a 3gs with 4.3.5.

    I tried restoring the backups but it says that the backup from the 3gs will not install on the 3g until it is upgraded (which is not possible).

    Anyone knows a way around this?

    Thanks,
     
  2. saving107 macrumors 603

    saving107

    Joined:
    Oct 14, 2007
    Location:
    San Jose, Ca
    #2
    Their is no way around it.

    You can not restore from a back-up, if the back-up is from a higher OS.
     
  3. mikelegacy macrumors 65816

    mikelegacy

    Joined:
    Dec 5, 2010
    Location:
    Pittsburgh, PA
    #3
    Only way to downgrade is if you have your SHSH blobs saved from back when Apple was still signing them. Looks like you're SOL here.
     

Share This Page