My phone number is not coming up under settings. I talked to apple support four times we tried everything. Told me to call my carrier to say I needed a carrier system update. the Carrier UTS did not know what I was talking about.
iPhone 6, iOS 12
You can manually check for and install a carrier settings update with these steps: Make sure your device is connected to a Wi-Fi or cellular network. Tap Settings > General > About. If an update is available, you'll see an option to update your carrier settings.
Update your carrier settings on your iPhone or iPad - Apple Support
My phone number
