Unlocking my iPhone XR

If you are asking about how to unlock your phone for use with another carrier, you must first contact the carrier to which the phone is now locked.

Only the carrier can unlock the phone. Apple is not involved in this.

Depending on the original agreement with your carrier, please note that they may be under no obligation to unlock the phone.

Hi! You can customise the ways in which you unlock your iPhone by following these steps:

1. Open Settings
2. Tap Face ID & Passcode

This may make it easier for you to unlock your iPhone, if this is what you mean?