Originally Posted by Platinum
You know the exact same thing happened to me yesterday... I had my phone about a week and no issues, then all of the sudden I wake up and it said "No Sim". I took it in and out a few times with no luck, then I went to the AT&T store and got a new SIM - went through the activation agian (which only took like 2 mins) and it was fixed. Maybe the heat from the phone damages the sim card or something. You should get a new sim and it should be fine.
My phone did seem especially hot last night. I attributed it to my leaving Wi-Fi on for hours even though I wasn't literally using it (some of this time it was in my pocket or I was charging it). In general, should the iPhone not be stored in your pocket?
I'll call my AT&T store when they open to see if they have the iPhone SIM card.
Thanks,
Ken