Can I update my IPhone?

wailinaung9899 wrote:

I want to update my IPhone to use SIM cellular.

iPhone 7, iOS 15

SIM cellular(?)

iPhone7 — maximum iOS Latest release of iOS 15.8.3

Talk to you Carrier if you have issue with your SIM card.

Remove or switch the SIM card in your iPhone - Apple Support

Remove or switch the SIM card in your iPhone - Apple Support

ref: SIM not supported No Service Searching Ne… - Apple Community

If you see 'invalid SIM' or 'no SIM' on your iPhone or iPad

If you see 'invalid SIM' or 'no SIM' on your iPhone or iPad - Apple Support

wailinaung9899 wrote:

I want to update my IPhone to use SIM cellular.

This makes no sense.

Please post in your native language.