Help! iPhone won't recognize Sim card

Discussion in 'iPhone Tips, Help and Troubleshooting' started by tolu, Jan 13, 2011.

  1. macrumors newbie

    Joined:
    Jan 9, 2011
    #1
    My unlocked iPhone 3g iOs 4.0.1 suddenly stopped recognizing my sim card and any other sim. It says sim failure. Don't know what to do. Pls pls pls help!
     
  2. macrumors 68040

    PsstGreek

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    #2
    What is your iPhone baseband? If it's 5.14 or 5.15 that's your problem.
     
  3. macrumors newbie

    Joined:
    Jan 14, 2011
    #3
    greetings from Athens!

    I have a similar problem, I have bought a locked iPhone 4 32gb from the US (I'm using it in Greece currently) in the summer, I have the 4.0 iOS, baseband 01.59.00 and jailbroken. For the last days, several times the phone gets the no service message or sim failure, I have to either switch on and off the airplane mode, or to reset network settings or to hard reset to make it get a signal. Do you know what is going on? The problem has occured only a couple of times since I got the phone but not so often as the last 2 days.
     
  4. macrumors 68040

    PsstGreek

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    #4
    Is the iPhone unlocked as well, or no? That sometimes happens to me with my iPhone 4 on AT&T. It drives me insane. A hard reset fixes the issue.
     
  5. macrumors newbie

    Joined:
    Jan 14, 2011
    #5
    I think the phone is still locked, I have tried hard reset, it works fine for a couple of hours and then ''no service'' or sim failure, I will try to update to 4.1 this weekend, keeping the same baseband ofcourse, hopefully I will get some better results
     
  6. macrumors 68040

    PsstGreek

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    #6
    Remember you can only update to 4.1 if you have SHSH saved.
     
  7. thread starter macrumors newbie

    Joined:
    Jan 9, 2011
    #7
    Re: Help! my iPhone won't recognize sim card

    Psst Greek, don't know what my iPhone baseband is. Still don't know what to do!
     
  8. macrumors 68040

    PsstGreek

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    #8
    To check the baseband go to Settings > General Settings > About > Modem Firmware.
     
  9. thread starter macrumors newbie

    Joined:
    Jan 9, 2011
    #9
    Re: Help! my iphone won't recognize sim card

    Psst Greek, my iphone baseband is 5.13.04. What next?
     
  10. macrumors 68040

    PsstGreek

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    #10
    Is Ultrasn0w installed? Cydia > Manage > Resources > repo666.ultrasn0w.com > Ultrasn0w > Install
     
  11. thread starter macrumors newbie

    Joined:
    Jan 9, 2011
    #11
    Re: Help! my iPhone won't recognize sim card

    Psst Greek, I have ultrasnOw installed. But's turned off in mobile substrate addons. Do I have to uninstall it or turn it on? Also serial faker is turned off, though I don't know what it is!
     
  12. macrumors newbie

    Joined:
    Jan 14, 2011
    #12
    Saved my shsh with tinyubrella, but when i try to manually restore to 4.1, itunes say cannot restore error 1604..
     
  13. macrumors 68040

    PsstGreek

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    #13
    Use TinyUmbrella to kick your iPhone out of recovery.
     
  14. macrumors 68040

    PsstGreek

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    #14
    If you're using T-Mobile U.S. make sure you have 3G off. It could be that something is wrong with your sim card. Uninstall and reinstall ultrasn0w.
     
  15. macrumors newbie

    Joined:
    Jan 14, 2011
    #15
    done that, iphone is still with 4.0 ios, searching forum for 1604 error solution, thanks for your help
     
  16. macrumors 68040

    PsstGreek

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    #16
    Are your host files edited? After that, put your iPhone in DFU mode then restore to 4.1
     
  17. macrumors newbie

    Joined:
    Jan 14, 2011
    #17
    i will try to do that the soonest possible, I will get back to you with the results
     
  18. macrumors newbie

    Joined:
    Jan 14, 2011
    #18
    put it in dfu mode and restored it to 4.1, got the 1004 error at the end of the restore but now i'm stuck on dfu mode. Any ideas how to get out? tinyumbrella wont recognise the device as connected, tried holding home and power button but still dead..
     

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