'Cellular issue detected' on my iphone 12 pro max

I have similar issue with my 12 pro max after updating to ios 16. I have tried everything even i tried replacing my sim card.

it says “Cellular Data Issue”

See these Apple articles below:

If you see No Service, Searching, or SOS on your iPhone or iPad

If you see No Service, Searching, or SOS on your iPhone or iPad - Apple Support

Manually update your carrier settings on your iPhone or iPad

Manually update your carrier settings on your iPhone or iPad - Apple Support

Update your network provider settings manually on your iPhone or iPad

Update your network provider settings manually on your iPhone or iPad – Apple Support (UK)

Contact your cell service provider.

I did. Also i tried using different network sim as my phone is unlocked.

In that case click on the Get Support link at the top right of this page to start the service process.