1. iMore Question's Avatar
    How can I fix the invalid sim?
    10-23-2013 02:20 PM
  2. BreakingKayfabe's Avatar
    If it's a sim you regularly use and has worked, it's possible there is a problem with it and you'll need a new sim from your carrier.
    10-23-2013 02:28 PM
  3. Ipheuria's Avatar
    Also try turning off your iPad pull out the SIM tray and reseat the SIM then turn the iPad on. If it keeps happening make an appointment at the genius bar. I once had to get my iPhone 4 replaced because I was getting the invalid SIM error constantly.
    10-23-2013 03:26 PM

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