Switching Carriers Without Losing Your Number: Step-by-Step

Your phone number is portable by law in the United States. Done in the right order, a switch takes about ten minutes with almost no downtime. Done in the wrong order, you can lose the number permanently.

Never cancel your old service first. Cancelling releases the number and the port will fail.

Step 1: Confirm your phone is unlocked

A locked phone cannot activate on a new network, no matter how the port goes. Check the lock status first.

Step 2: Gather your port-out information

• Account number from your current carrier
• Transfer PIN or port-out PIN — usually generated in the carrier app and valid for a limited time
• Billing ZIP code and the account holder's name exactly as it appears on the bill
• The exact phone number you are transferring

Step 3: Sign up with the new carrier

Choose 'transfer my existing number' during signup and enter the details above exactly. Pick eSIM if your phone supports it — activation is nearly instant and nothing has to ship.

Step 4: Wait for the port to complete

Step 5: Verify, then stop

• Place a call and send a text from the new line
• Confirm mobile data works off Wi-Fi
• Re-register two-factor authentication and messaging apps if prompted
• Do not cancel the old line — a completed port closes it automatically

Mistakes that break a port

• Cancelling the old service before the port completes
• A mismatched account number, PIN, or billing ZIP
• An expired transfer PIN — regenerate it if the port stalls
• A locked device