iPhone not detecting SIM card and randomly rebooting

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Level 1

8 points

iPhone 13. iOS 26.1

My iPhone suddenly decided to stop detecting my SIM card.

It’s been going on for over a week now. 

Around the same time it started rebooting on it’s own, for no apparent reason (not overheating or anything)

I get service for maybe 30 seconds when I turn on my phone and then it’s gone.  

The fact that I get some service when I boot means that the phone can stil read/detect my SIM card. So hopefully not a hardware problem ?

I tried resetting network settings. But to no avail. 

No idea what to do regarding the SIM or the unwanted reboot 

Not having any service is really problematic. I can’t be reached or reach anyone when I’m not near a place with wi-fi 

When I’m outside, my phone is now just a glorified iPod. 

Posted on Dec 12, 2025 5:00 AM

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Answer 1

Top-ranking reply

Level 10

224,880 points

If it were just a problem with the SIM not being recognized, I'd say get a replacement SIM from your carrier...

The reboots point to a potential hardware problem, though.

Make an appointment at the Genius Bar of your local Apple Store or take it to your local authorized service provider.

Please make sure you have a good backup!

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