What Is a Personal Identification Number? A PIN is a short series of numerals that a card or account holder must use to authenticate their identity in a digital transaction.

Most AT&T users will need a transfer PIN if they wish to move their account or a line to a new carrier. Here's how you can find your PIN in MyAT&T.

Get your transfer PIN by visiting a Metro by T-Mobile store If you have problems getting your transfer PIN or want to talk to someone face-to-face, visit a Metro by T-Mobile retail store.