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Thread: Invalid Sim-3gs and T-mobile

  1. #1
    Default Invalid Sim-3gs and T-mobile
    Newbie to the unlock process and having issues with a jailbroken and unlocked 3gs version 4.3.5, firmware 06.15.00. I can't get the phone to recognize the sim card. I install it and get an invalid sim error. I've turned off 3g and reloaded ultrasn0w to no avail. Wanted to see if there is anything else to try before I return to the seller. Thanks

  2. #2
    Livin the iPhone Life
    Join Date
    May 2008
    Thanked 789 Times in 731 Posts

    If you can return it, that's best. Let the seller get it working with your sim.

  3. #3
    Retired Moderator iYeow's Avatar
    Join Date
    Feb 2008
    Vancouver, Canada
    Thanked 2,764 Times in 2,652 Posts

    Ultrasn0w will not unlock at 4.3 4 or 4.3.5 , you need to downgrade to 4.3.3 which you may not be able to , otherwise the seller would have done it. Ultrasnow 1.2.3 works up to IOS 4.3.3

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