Q: iPhone 5 and "NO SIM CARD INSTALLED" error

I think mine is getting serious. This problem never happened before iOS 6.1.2. After I updated to the said iOS, my iPhone 5 started to have this problem. Mine is about 1 months plus old and today it happens again, twice within few hours. And the second time can't even be fixed by restarting(by holding the top button fir long enough time) the phone. It had to be done by getting the sim out and put it back.

What my friend told me was that this is an iOS 6.1.2 problem.

I have this same problem since the 6.1.2 update. I get the 'No Sim' error at random intervals. The only way to restore service is to reboot the phone. Not good. I have reset the phone and the network settings but it is still happening. Not happy about this at all. I had no problems until the 6.1.2 update.

I totally agree that this is a 6.1.2 issue.

Is anyone else still having this issue with 6.1.3?  It's happening to me several times a day for hours at a time, rendering the phone almost useless at this point

Take your SIMM out and clean the contacts with an eraser, put it back in and boot up, problem solved... have a nice day

Take the SIM card out and clean the car and blow compressed air in the sim slot. Also try a restore and if that doesn't work apple should replace it under the 1 year warranty.

Pull out SIM card clean with a Q-tip and rubbing alcohol. Problem solved.

All those suggestions are a no-go for me.. tried cleaning it, tried the tape trick, even had Verizon give me a new SIM.  Same issue, I'm convinced it's the phone.

How unfortunate all this!

I mean, really, can I ever have a phone that doesn't have a problem with it?

So dificult to deal with new technologies.

Mine worked fine when I put it in and then after a few hours got the "No SIM" alert.

I restarted, took the chip in and out several times and then it came back out of no where.

After a few hours, again, same problem without even touching the sim card slot.

I have put it in and out several times again, restarted and nothing.

So unfortunate. Will look into getting a new SIM card and return with possible help.

Same problem here... This happened last week and it was "fixed" after I restart the phone. Same problem today and I have tried everything and the error message still there. No phone, no internet, no nothig!!!!

I bought another sim card and it never stopped working again. Have you tried doing the same?

Just took a call, hung up, and the dreaded "No SIM Card Installed" message popped up! Rebooting the phone "fixes" the problem. It bothers me that I can't rely on my phone to receive calls without me compulsively checking it every few minutes to make sure the SIM Card is recognized!!!

my phone stopped recognizing my sim card and i restarted it a bunch of times but the was i got it to work was to clean the sim card with a cotton swab and my own saliva (i didnt have alcohol but it would probably work better) dryed it, polished it with a tea towle and voila! it connected instantly without even turning it off.

I had similar problem. Replacement of SIM card solved the problem. In my case SIM card had currupted.

I Was having the exact same problem for last 4 days and today I replaced the sim with a new one. Right now my phone works smoothly.

People do not panic iphone is the best beast on the market just clean your sim and it will work