iPhone 11 Cellular issue error

My iPhone 11 is not able latch to mobile network the cellular data modem switch is grayed out and also I can’t see any modem firmware sw version in general setting .The error I see is Cellular data issue

I have tried to Reset the network setting and all settings , Reboot the iPhone after enabling flight mode ,Removed and reinserted the sim but it’s not working.

if anyone has encountered such issues then pls suggest solution to resolve this issue.

Thanks

jitendra