You can keep your phone number when you switch carriers by requesting a number transfer, also called porting

When you move to a new phone provider, you do not have to accept a new phone number. Number porting — the process of moving your existing number to a different carrier — is a legal right in the United States. The new carrier handles most of the work, but you need to provide specific information and timing matters.

The process typically takes three to five business days, though it can occasionally take longer if your current carrier disputes the transfer or if there are account issues. During this window, your service may be interrupted for a few hours. You will need your account number, billing phone number, and account PIN or password from your current carrier before you start.

Key Takeaways

  • Contact your new carrier first and tell them you want to port your existing number; they will guide you through what information to provide.
  • Have your current carrier's account number, billing phone number, and account PIN or password ready before you request the transfer.
  • Your old carrier cannot legally block a port, but they may delay it if your account has unpaid charges or if the account holder's name does not match the request.
  • Service will likely drop for a few hours during the transfer window; plan accordingly and keep your old phone powered on until the new one receives the number.
  • If the port fails, contact your new carrier's customer service immediately — they can resubmit or troubleshoot the block.

What information your new carrier will ask for

When you contact your new carrier to start a port, have these details from your current account ready. The new carrier's representative will enter this information into the porting request, which is then sent to your old carrier for verification.

Account number: This appears on your current carrier's bill or in their app. It is not your phone number. Billing phone number: The phone number associated with the account — usually the number you are porting, but sometimes a different line if you have a family plan. Account PIN or password: A security code your current carrier uses to verify you own the account. If you do not have a PIN, you can set one before requesting the port, or your new carrier can sometimes proceed without it if you provide other verification.

Some carriers also ask for the account holder's name exactly as it appears on the bill, the service address, and the account opening date. If any of this information does not match what your old carrier has on file, the port will be rejected and you will have to correct it before trying again.

The timeline from request to active service

The port request is submitted to your current carrier, who has up to one business day to accept or reject it. If accepted, the actual transfer typically happens within two to four business days. During this window, your service may cut out for anywhere from a few minutes to a few hours as the number moves between carriers' systems.

You should keep your old phone powered on and in service during this time, even though you may not be able to make calls or send texts. Once the port completes, your new carrier's network will recognize your number and your service will resume on the new phone. Text messages sent to your old number during the transfer may not arrive, so alert important contacts that you are switching.

If the port does not complete within five business days, contact your new carrier's customer service. Delays usually mean your old carrier rejected the request — often because of a mismatched account detail, an unpaid balance, or a dispute over who owns the account.

Why a carrier might reject or delay your port

Your current carrier cannot legally refuse to port your number, but they can reject the request if information does not match or if there are account issues. The most common reason for rejection is a mismatch between the name on the account and the name provided in the port request. If you recently married, divorced, or changed your legal name, update it with your current carrier before requesting the port.

Unpaid balances, past-due bills, or active contract disputes can also trigger a rejection. Some carriers will not port a number if the account has an outstanding charge. If this happens, you will need to settle the balance or contact the carrier to dispute it before resubmitting the port request.

Account ownership disputes are rare but can happen if multiple people claim rights to the number — for example, in a divorce or a business dissolution. If your carrier says there is a dispute, ask them in writing what the issue is and what documentation they need to resolve it.

Porting from a prepaid or month-to-month plan

Prepaid and month-to-month accounts can be ported just like contract plans. The process is the same: provide your account details to the new carrier, and they submit the port request. However, some prepaid carriers have stricter verification requirements or may require the account to be in good standing (no past-due balance) before they will approve the transfer.

If you are porting from a prepaid carrier, check whether you have any remaining balance or unused service days. Some carriers will refund unused prepaid amounts after the port, though others do not. Ask your current carrier's customer service what happens to your prepaid balance before you request the port.

What happens to your old carrier account after the port

Once the port completes, your old carrier account is closed. You will no longer be able to use that phone number with them, and any remaining balance on the account will be due. Some carriers send a final bill; others may credit a refund if you had prepaid service or a credit balance.

Keep records of the port confirmation from your new carrier and any final bill from your old carrier. If you are later billed for service after the port date, you have proof that the account was transferred and closed.

Porting to or from a business line

Business phone numbers can be ported using the same process, but verification is often stricter. Your new carrier may require documentation that you are authorized to make changes to the business account — such as a business license, tax ID, or a letter from the account holder. This is to prevent unauthorized transfers of business numbers.

If you are porting a business number, contact your new carrier's business support team rather than their consumer line. They can tell you what documentation to prepare and may be able to expedite the process. The timeline is usually the same as for personal numbers, but having the right paperwork ready prevents delays.

Frequently Asked Questions

Can I port my number if I still owe money to my old carrier?

It depends on the carrier and the type of debt. Some carriers will port your number even if you have an unpaid bill, while others will reject the request until the balance is settled. Contact your old carrier and ask whether an outstanding balance will block the port. If it will, you can either pay it or dispute it before resubmitting the request.

What if my port fails and I need service right away?

If the port is rejected and you need to make calls immediately, activate a temporary number with your new carrier while you troubleshoot the port. Once the port succeeds, you can switch back to your original number. Your new carrier can walk you through this option.

Can I port my number to a different type of carrier, like from a landline to a cell phone?

Yes. Landline numbers can be ported to cell carriers, and vice versa. The process is the same, though some carriers may have additional verification steps for landline-to-mobile transfers. Ask your new carrier whether they support the type of port you need before you start.

Do I have to port my number, or can I just get a new one?

You can choose to get a new number instead of porting. This is simpler and faster — your new carrier can activate you immediately with a new number. However, you will need to notify everyone who has your current number. Porting takes longer but saves you the step of updating contacts.

What if the port completes but my old phone still shows service?

This can happen if your old carrier has not fully deactivated the line. Power off your old phone and power it back on. If it still shows service, contact your old carrier and ask them to confirm the port was completed and the line was deactivated. Your new phone should have service on your number by this point.