Just bought an iPhone 5 and it stopped working after 6 hours. I'm getting message that SIM card is not detected.. I"m using AT and T. what the **** is this? I have a phone interview and have to face such type of issues.
Remove and reinstall the SIM card.
If the issue continues replace the SIM card.
This happened to me
take out sim card clean with a pencil eraser wipe clean with lent free towel reinstall sim card
Retrieving data ...