My iPhone says no SIM

Same problem as others with no SIM card error. First time occurred when trying to activate phone. After about 12 hours, phone finally worked. Then several hours later received error again. Rebooted the phone and it worked, and has been working now for over 24 hours without a problem. I called Verizon tech support who put me in touch with an apple senior tech specialist and they recommended to change the SIM card. If that does not work, the apple specialist told me that apple would replace my phone. Verizon is now sending a new SIM card to me to test.

I spoke too soon. The phone stopped working again. This is very frustrating!

Hey there! My phone was unlocked by an unauthorized method. And i recently updated it to ios 6 becasue i wannetd to get a factory unlock when all of sudden my phone doesn't have ANY sims working on it at all, even the original sim that came with the phone itself. Why's this happening and can it be fixed? Thanks!

This is all STUPID. I got a new phone cause my lock button wasn't working & ever since I got my new iPhone it keeps saying "No Sim" I've turned it off & on various times. I've even taken out the Sims card. I also went to my phone company to get a BRAND NEW Sims card. It worked just fine the first day but than the next day it went back to No Sim. Its been like this for a couple of months already. In a couple of days im going to the apple store to see what they can do about it. This is seriously STUPID.!