Network carrier

SIM Not Supported means your phone is locked to a different carrier.

You will need to contact them and ask them to unlock it.

Until they do, your phone will not work with any other SIM.

How to unlock your iPhone for use with a different carrier - Apple Support

Ritik__malik Said:

"Network carrier: I buy iphone 13 pro max from US and currently i am in india and the indian sim is not working on my iphone. its shows sim not supported.whats the solution"

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Troubleshooting SIM Cards:

A. Whom to Contact:

Contact your new Carrier, asking them for a new SIM card. They'll configure it for you.

B. Location of Purchase:

Your iPhone might not work in a different country/location, than where it was purchased. So,