I just updated to 14.4.1. The physical SIM for my India Airtel number is not being recognized. Says “SIM failure”. I restarted the iPhone. I removed and placed back the SIM tray. No luck. I use my Verizon number on the e-SIM. This is regarding my iPhone 12 Pro Max.
Hi sreddy1111,
We appreciate you reaching out through Apple Support Communities for help with this message your're seeing about the SIM card in your iPhone. We'd love to point you in the right direction here.
Will it be possible to eject the SIM card and test it in another device, while also testing a different active SIM card known to be working properly in your iPhone 12 Pro Max? This will help to confirm if the issue is isolated to this specific SIM card.
We've got a helpful resource to share with you. Let us know if you've got any questions about this guide:
If you see 'invalid SIM' or 'no SIM' on your iPhone or iPad - Apple Support
Have a great day!
Hi sreddy1111,
We appreciate you reaching out through Apple Support Communities for help with this message your're seeing about the SIM card in your iPhone. We'd love to point you in the right direction here.
Will it be possible to eject the SIM card and test it in another device, while also testing a different active SIM card known to be working properly in your iPhone 12 Pro Max? This will help to confirm if the issue is isolated to this specific SIM card.
We've got a helpful resource to share with you. Let us know if you've got any questions about this guide:
If you see 'invalid SIM' or 'no SIM' on your iPhone or iPad - Apple Support
Have a great day!
Hello sreddy1111,
I had the same issue with iPhone X, but the SIM is working fine with iPhone 6. What I have figured out is after upgrading iPhone X to 14.4.1 Carrier setting upgraded to 45.0 (Setting ->General-About- under Primary), on iPhone 6 with iOS 12.5.1 Carrier is 36.0.
So we may have to get a new Airtel SIM that works with the current Carrier setting.
I did verify by doing the things you recommended above. I was able to determine that the SIM card issued by Airtel got messed up when I updated to iOS 14.4.1. It happened as soon as the iPhone rebooted after downloading the new update. Now I have to wait for a few months to get a new SIM card issued by them when I travel back to India.
Hi sreddy1111,
Thanks for keeping us updated. We're glad to hear that you were able to figure out the reason for this issue.
Hope you have a great day.
SIM failure after updating to ios 14.4.1
