02-07-2013 12:16:39 PM
Hi! Try this link and let me know if it helped. Troubleshoot your device
02-07-2013 09:42:47 PM
Not that uncommon. I had to go to an AT&T store to get another sim card for my out of the box Lumia 920.
The one that came with the phone was bad. Call customer service if the link doesn't help.
02-23-2013 10:21:33 PM
I just had the same thing happen with the SIM that came in my out-of-the-box Lumia 920, which is extremely inconvenient because now both phones are completely useless to me until customer service opens! Not terribly impressed with ATT right now.