Originally Posted by chassum
Regarding the missing SIM card issue: Sometimes the SIM card actually is bad, but more often than not (I suspect) it has merely become slightly dislodged (wonky
. Ejecting and reseating the card worked for me and may work for you. At any rate, it's something to try before heading back to the store.
Yep, this did it for me. Ejected and reseated it, and I haven't had a missing SIM warning since.