Since updating to iOS 8, friend with an iPad 2 keeps getting the message No SIM Card Installed. While the iPad has sim card capability it has never had a sim card fitted. Have tried turning Cell Data off in Settings but it is greyed out, have tried turning iPad off/on, have tried rebooting iPad all with no change/success. Appearance of message seems completely random and occurs multiple times in a user session. Checked on Apple's forums and here and have found some old threads, but no fixes. Does anybody else still have this problem or a fix?