No SIM Card Installed error message when SIM Card is installed and works perfectly well in another device. Issue seems to be intermittant.
iPad 2, iOS 5.1.1, Fault seems to be intermittent
Posted on May 21, 2012 7:40 AM
Q: No SIM Installed when SIM Card is installed and works ok in another device
Try restarting and restoring your iPad.
If that doesn't do it, try having a Genius take a look at the iPad.