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  1. bobby0724's Avatar
    Hello

    i have iphone 1.0.2 activate and unlock running well until bey mistake i upgrade to 1.1.1, i downgrade back to 1.0.2 but i am getting the invalid sim error, the problem i have is that i dont have the original ATT sim, can i fix this or i am just stuck with a bricked iphone ?
    2007-11-09 06:22 PM
  2. dangerousandre's Avatar
    just follow the guides on how to downgrade and upgrade to 1.1.1. I dont think it matters what sim your'e using.
    2007-11-09 07:29 PM
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