No SIM error message

Discussion in 'Jailbreaks and iOS Hacks' started by i11i1i, Jan 3, 2011.

  1. i11i1i macrumors regular

    Joined:
    Jul 28, 2008
    #1
    Hey guys,

    Today alone, I've had to reboot my iPhone 4 a dozen times because a "no SIM" message keeps popping up. I'm running iOS 4.1. It happens when I'm on the phone, using the web and when the phone is inactive on my desk.

    I had this issue when I first got the phone and AT&T replaced my SIM card twice.

    Any idea what causes this? I plan on going to an Apple Store tomorrow to get it looked at, but if they end up swapping my phone, will I be able to jailbreak the iOS loaded on there?
     
  2. Applejuiced macrumors Westmere

    Applejuiced

    Joined:
    Apr 16, 2008
    Location:
    At the iPhone hacks section.
    #2
    Take out the sim and make sure it sits tight on the sim tray.
    If it keeps doing it you will have to get it replaced.
    If you get a replacement with 4.2.1 you will be stuck with a tethered JB for now. If you get 4.1 you're good.
     
  3. OverSpun macrumors 6502a

    OverSpun

    Joined:
    Sep 12, 2006
    Location:
    California
    #3
    Weird.. I just opened this forum about 'no sim' issues, because my ip4 keeps dropping to no sim so I restarted it 5x and sometimes it says no sim and then comes back on it's own. I'm on 4.0.1 still.
     
  4. i11i1i thread starter macrumors regular

    Joined:
    Jul 28, 2008
    #4
    Yeah, I've had it replaced over and over again. It's happened during enough of my calls today that I suspect the fine people at Apple will see how many dropped calls I've had and just swap it out.

    I forget...what's the difference between tethered JB and non-tethered? Will I still be able to use pkgbackup to basically re-create the situation I have now? Or will I be starting over?
     
  5. Applejuiced macrumors Westmere

    Applejuiced

    Joined:
    Apr 16, 2008
    Location:
    At the iPhone hacks section.
    #5
    Yes, you can still use pkgbackup.
    A tethered jailbreak means that each time your device loses battery power or needs to be rebooted, you must attach it to a PC or Mac to boot into the jailbroken state.
     
  6. i11i1i thread starter macrumors regular

    Joined:
    Jul 28, 2008
    #6
    Wow. That sounds pretty awful. I guess if I keep the battery above 10 percent and don't drop it in a lake though, I should be okay as far as the tethering necessity.
     
  7. Applejuiced macrumors Westmere

    Applejuiced

    Joined:
    Apr 16, 2008
    Location:
    At the iPhone hacks section.

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