What happens when you transfer your phone number

When you transfer your phone number, you're moving it from one carrier to another while keeping the same number. The process is called a port or porting. Your new carrier handles most of the work — they contact your old carrier, request your number, and set up it on their network. You don't lose service during the transfer; your old carrier keeps your number active until the new one takes over, usually within one to three business days.

You can port a number from any major carrier (AT&T, Verizon, T-Mobile, etc.) to any other carrier, including smaller regional carriers and some prepaid services. You can also port from a landline to a mobile phone, or from mobile to landline. The number itself doesn't change — your contacts, accounts linked to that number, and your phone history all stay the same.

Key Takeaways

  • You need your account number and PIN from your current carrier before you start the port, and your new carrier will ask for both.
  • The port usually takes one to three business days, and your service continues on your old carrier until the new one activates your number.
  • You should notify any accounts tied to your phone number (banks, two-factor authentication apps, medical offices) before the port happens.
  • Some carriers charge an early termination fee if you're under contract, but porting your number does not automatically break your contract.

Get your account information from your current carrier

Before you port, you need two pieces of information from your current carrier: your account number and your PIN (personal identification number). Your account number appears on your monthly bill. Your PIN is a security code you set up when you opened the account — if you don't remember it, call your carrier's customer service line and they can reset it or send you a new one.

Call your current carrier or log into your online account to find both. Write them down or take a screenshot. You'll give this information to your new carrier when you start the port. If you can't find your PIN, contact your carrier at least a few days before you plan to port — getting a new PIN can take time.

Choose your new carrier and start the port

Visit the new carrier's website or go to a store location and tell them you want to port your number. They'll ask for your account number and PIN from your old carrier, your phone number, and your name and address. Some carriers also ask for the service address on your old account. Have your bill handy so you can provide exact details.

The new carrier will submit a port request to your old carrier on your behalf. You don't contact your old carrier directly — the new one handles the entire handoff. The new carrier will give you a confirmation number and tell you when to expect the port to complete. Keep this confirmation number in case you need to follow up.

What to do while the port is in progress

Your old carrier keeps your number active until the new carrier takes over, so you can keep using your phone normally. You won't have a gap in service. However, you should not cancel your old account or service plan until the port is complete — canceling early can interrupt the port or cause it to fail.

During the port window (usually one to three business days), update any accounts that use your phone number for two-factor authentication or recovery. This includes your bank, email, social media, and any apps that send codes to your phone. Log in and change the phone number on file to your new carrier's network if possible, or at least make a note of which accounts need updating. Once the port completes, your old carrier may not be able to receive texts or calls sent to your number.

Complete the port and switch to your new carrier

When the port is complete, your new carrier will send you a text or email with confirmation. At that point, your number is active on the new network. Turn off your old phone or remove the SIM card, then turn on your new phone (or the phone you're using with the new carrier). Your number should work when ready.

If you don't receive confirmation within the timeframe your new carrier gave you, contact them. Ports occasionally stall if there's a mismatch in account information or if your old carrier flags something. Your new carrier can check the status and resubmit the request if needed. Once your number is working on the new network, you can cancel your old service plan if you want to — but you're not required to do so when ready.

What to do after the port is complete

Update your phone number on any accounts that didn't let you change it during the port. This includes your bank, insurance company, medical offices, and any services that call or text you. Log into each account and update the phone number on file. This ensures you'll receive important notifications and can recover your account if you forget your password.

Check that two-factor authentication is working correctly on your most important accounts (email, banking, social media). Try logging out and logging back in to make sure the verification codes arrive on your new number. If an account is still trying to send codes to your old number, contact that company's support and ask them to update their records.

Fees and contract considerations

Porting your number itself is free — carriers cannot charge you to move your number to a different provider. However, your old carrier may charge an early termination fee if you're still under contract. This fee varies by carrier and by how much time is left on your contract. Check your bill or call your old carrier to learn about you owe one.

Porting your number does not automatically cancel your contract or service plan. You have to cancel separately if you want to stop paying your old carrier. Some people port their number and keep their old plan active for a few weeks as a backup, then cancel once they're sure everything is working on the new carrier. Others cancel when ready. The choice is yours, but don't cancel before the port is complete.

Frequently Asked Questions

Can I port my number if I'm in the middle of a contract?

Yes, you can port at any time. However, your old carrier may charge an early termination fee if you're still under contract. The port itself is free, but the fee is separate. Check your contract or call your carrier to find out what you owe before you start the port.

What if my port fails or takes longer than expected?

Ports occasionally stall due to mismatched account information or holds placed by your old carrier. Contact your new carrier and ask them to check the status. They can resubmit the request or troubleshoot the issue. If it's been more than five business days, ask your new carrier to escalate the case.

Do I need to buy a new phone to port my number?

No. You can use the same phone if it's compatible with your new carrier's network. You may need a new SIM card, which your new carrier will provide. If your phone is locked to your old carrier, you may need to unlock it first — contact your old carrier to request an unlock.

Can I port a number that's been disconnected?

It depends on how long ago it was disconnected. Most carriers allow ports within 30 to 60 days of disconnection. If it's been longer, the number may have been reassigned. Contact your new carrier with your old account number and they can check whether the number is still available to port.

What happens to my old voicemail and text messages?

Your old voicemail and text messages stay with your old carrier and old phone. They don't transfer to your new carrier. read or save any messages you want to keep before the port happens. After the port, your old carrier may delete your voicemail after a set period (usually 30 days), so act quickly if there's anything you need.