How to Add a Phone Number to Your Apple ID on an iPhone

To add a phone number to your Apple ID on an iPhone, follow these steps:

1. Open the "Settings" app on your iPhone. 2. Tap on your name at the top of the screen. 3. Scroll down and select "Password & Security." 4. Tap on "Add a Trusted Phone Number." 5. Enter the phone number you want to add and select whether you want to verify it with a text message or phone call. 6. Tap "Next" and wait for the verification code to arrive. 7. Enter the verification code and tap "Verify."

Your phone number will now be added to your Apple ID as a trusted phone number. This will allow you to use it for two-factor authentication and account recovery.