Ios Update Carrier Settings. To verify that you have the latest carrier settings installed, contact your carrier. If you set up a new eSIM or insert a new SIM card into your iPhone or iPad, you might need to download the carrier settings for your new carrier.
It's totally understandable, considering how time-consuming some of them can be. To see the version of carrier settings on your device, tap Settings > General > About and look next to. To learn more, visit Apple Support: Update your Apple Watch.
On next screen, press on <About> option Latest carrier update is visible next to <"Carrier" or "Network Provider"> If still you did not receive current version, then you can restart as forcefully to your phone and check once again.
Tap Settings > General > About.
Follow the onscreen instructions to install your carrier update. To see the version of carrier settings on your device, tap Settings > General > About and look next to. But here's the thing: you might have missed important updates, like your carrier settings.