Port-out PIN

A port-out PIN (sometimes called a number-transfer PIN or port PIN) is a separate code your carrier requires before authorizing the transfer of your phone number to a different carrier. It's distinct from your account password and your voicemail PIN. Without a matching port-out PIN, the new carrier's port-in request gets rejected — both as a customer-protection measure (so somebody can't port your number without your knowledge) and as a checkpoint when you actually do want to switch.

Where to find / generate one

• Verizon: My Verizon app → Account → Number Transfer PIN. Generates a 6-digit code valid for 7 days.
• T-Mobile: Dial #PORT, or go to T-Mobile app → More → Account → Account PIN. The Account PIN doubles as the port-out PIN.
• AT&T: att.com → My wireless → Manage account → Get my number transfer PIN. 6-digit, valid 7 days.
• Mint Mobile: Mint app → Account → Get account number / PIN.
• Other MVNOs: Check the account section of their app or call support. Most carriers give a one-time generated PIN; a few use your existing voicemail PIN.

Common gotchas

Port-out PINs expire — usually within 7 days of generation. Don't request one and let it sit. Generate it right before you submit the port-in request at the new carrier. If the port-in fails because of "PIN mismatch," regenerate the PIN at the old carrier and try again.

Some carriers offer to disable port-out entirely (T-Mobile Account Takeover Protection, Verizon Number Lock) — when this is on, you have to unlock the line before generating a port-out PIN. If the unlock UI is missing on a port that should be straightforward, the lock is often the cause.

Setting a strong port-out PIN is also the single best defense against SIM swap fraud — without the PIN, an attacker can't move your line even if they've already pretended to be you.