1. babond, Sep 19, 2011

   Last edited: Sep 19, 2011

   babond macrumors member

   Joined:

   Sep 5, 2007

   #1

   Was wondering if anyone had a good tutorial on downgrading the OS to make the phone run smooth? My previous phone broke and I need this to hold me over.

    

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2. Reach9, Sep 19, 2011

   Reach9 macrumors 68020

   

   Joined:

   Aug 17, 2010

   Location:

   In America

   #2

   Try this:
   
   http://www.youtube.com/watch?v=KGqul3wjKJc
   
   but you should find your answer on YouTube.
   
   What i did is that i installed iOS 3.1.3 into my iPhone 3G, and kicked it out of DFU mode with an app called 'tinyumbrella'

    

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