Help Iphone Says Sim Failure

Discussion in 'iPhone Tips, Help and Troubleshooting' started by willy16, Dec 20, 2007.

  1. willy16 macrumors newbie

    Dec 15, 2007
    Los Angeles
    This a 8GB iphone 1.1.2 unlocked for tmobile.
    I did restore the phone but didn't fix the problem:confused:
  2. matthewHUB macrumors 6502

    Nov 29, 2005
    mine did that after i unlocked it. think it's a biproduct of unlocking - instability. i took the sim out and wiped it and it hasn't happened since.
  3. willy16 thread starter macrumors newbie

    Dec 15, 2007
    Los Angeles
    I unlocked with Iphone Sim Free and it has been unlocked for about 3 months
  4. Third i Dev macrumors newbie

    Third i Dev

    Oct 11, 2011
    South Africa
    Possible cause for iPhone 4S SIM failure problem


    Received my 4S yesterday and have been encountering the same problem. Some testing indicates that the SIM failure only occurs when I have the phone in my case, which is the same one I've been using for my iPhone 4.

    The case fits the phone just fine, incl the buttons on the side, but it must have an adverse impact on the 4S, perhaps due to antenna design.

    Fitting the case produces the SIM failure error within a couple of minutes to about an hour, especially when the phone seems to be handing over between carrier radio frequencies. I've been using the phone without the case for a number of hours now and have not received the error again.

    If anybody else is able to reproduce the problem, please do confirm.


    Third i Development

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    check out TellUWhat FREE in the App Store!>

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