update from 3.1.2 to os 4.0

Discussion in 'iPhone Tips, Help and Troubleshooting' started by Neillim, Sep 16, 2010.

  1. Neillim macrumors newbie

    Sep 16, 2010
    is it possible to update from os 3.1.2 to os 4.0? my iphone is jailbroken with cydia also Rock both apps are in order. however I like to update to 4.0 and take some avantage of the 4.0 os. as you may know the latest os on itune is 4.1 to which no jailbreak app is available. i would be highly appreciate is someone can walk me thru the process.
  2. stormchaser macrumors 6502


    Mar 4, 2010
    Hi Neillim if you have just the 3G iphone i wouldn,t bother upgrading as it becomes non usuable after.

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