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.

If you're moving from Metro by T-Mobile to another carrier, you'll need your transfer PIN to port your number. Here's where it's located ...

Have a Motorola phone? Want to make it more secure? This secret PIN Scramble feature lets you do precisely that.

Sprint requires customers to use a PIN (personal identification number) for account security. The PIN is 6-10 characters and allows Sprint to confirm customer identification. It's required each time ...