Need help to downgrade from ios5.1 to 4.2.1 for an iphhone 3GS

Discussion in 'iPhone Tips, Help and Troubleshooting' started by ndhadha, Mar 28, 2012.

  1. ndhadha macrumors newbie

    Joined:
    Mar 28, 2012
    #1
    Hi All,

    Need help to downgrade from ios5.1 to 4.2.1 for an iphhone 3GS..
    I reset by jailbroken iphone by mistake and then I had to restore it using itunes.. so now my phone's locked again!! and i believe it has ios5.1 :( .. I want to downgrade the OS before unloacking it, since I've heard that a 3GS would become very slow with ios5.x

    Please please help!

    Thanks

    ND
     
  2. Bigsargewaymo7 macrumors newbie

    Bigsargewaymo7

    Joined:
    Jul 13, 2011
    Location:
    Florida
    #2
    SHSH Blobs?

    Did you save your SHSH Blobs? or No?
     
  3. ndhadha thread starter macrumors newbie

    Joined:
    Mar 28, 2012
    #3
    Bigsargewaymo7 - Thank you soo much for replying!! Well When I was searching the web for this came across a lot of references to SHSH..

    Unfortunately, I have no idea!! :( I have a Mac book with the latest itunes version.. I just restored my phone using that... I don't remember being asked to select any options!! :confused::confused:

    Is there a way I can check it?
     

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