My iPad 2 has suddenly said there is no SIM card installed and the Cellular connectivity tab in settings has frozen so I cannot use it. I have removed and reinstalled the SIM card twice and it still doesn't acknowledge it's existence. This has all happened since my iPad upgraded to iOs 6.0 could that be the fault? Is it a problem that I need to contact my cellular provider about? Does anyone know what I can do to convince my iPad it does have a SIM?
