Betting the answer is they bought a phone in the US that is carrier locked.
Welcome to Apple Support Communities.
If I'm understanding correctly, your SIM card is not being recognized properly. I will be happy to help.
Check out the steps below to see if it helps from our article: If you get an alert about the SIM card in your iPhone
- Make sure that you have an active plan with your wireless carrier.
- Update your iPhone to the latest version of iOS.
- Restart your iPhone.
- Check for a carrier settings update. Go to Settings > General > About. If an update is available, you'll see a prompt to select OK or Update.
- Remove your SIM card from the SIM card tray and then put the SIM card back. Make sure that the SIM tray closes completely and isn’t loose. If you use a SIM tray from a different model iPhone or from another phone manufacturer, it might not fit properly.
- Try using another SIM card. If you don't have one, go to your carrier's retail store and ask them to test with another SIM card. You might need to replace your SIM card.
If you still see an alert about your SIM card, contact Apple support.
Learn what to do if you see a SIM not supported alert.
Cheers.
I have a similar problem Airtel India sim does not work in My new IPhone X .After buying the best phone in the market you end you with a phone which is not working .I would seriously recommend Indian buyers to test the the sim with IPhone X before spending your life’s saving .If anybody has a solution please help for now the phones no better than a paper weight
Curious. Where was the phone purchased?
Hi Kartic8055,
I also have the same issue. How did you resolve the issue?
pls reply.
And as was originally asked in the thread (which the OP never answered), where did you buy the phone?
my iphone X does not work with airtel sim it displays NO SIM intermitently does anyone have the same problem