Moving your number to a new phone is usually automatic, but the steps depend on whether you're switching phones on the same carrier or moving to a different one

If you're staying with your current carrier and just getting a new device, your number transfers during the activation process — you don't need to do anything extra. The carrier handles it when you set up the new phone. If you're switching to a different carrier, you'll need to request a number transfer (sometimes called a "port") from your new carrier before you activate the new phone. This process takes a few hours to a few days and requires information from your current account.

The key difference is timing: staying with your carrier is seamless, while moving to a new carrier requires you to initiate the transfer and provide account details to prove you own the number.

Key Takeaways

  • If you're keeping the same carrier, your number moves automatically when you activate your new phone — no extra steps needed.
  • If you're switching carriers, contact your new carrier first and ask them to port your number; they will handle the request with your old carrier.
  • You'll need your account number, PIN or password, and billing address from your current carrier to authorize a number transfer.
  • Number transfers usually complete within a few hours to a few days, but your old phone may stop working before the new one is fully active.
  • Keep your old phone and old carrier account active until the transfer is complete and confirmed on your new device.

Transferring your number when staying with the same carrier

Contact your carrier's customer service or visit a store with your new phone and old account information. Tell them you want to activate the new phone with your existing number. They will deactivate your old phone and activate the new one on the same number and plan.

This usually happens immediately or within a few hours. Your contacts, text messages, and call history do not transfer automatically — you'll need to back those up separately using your phone's built-in backup tool (iCloud for iPhone, Google Account for Android) or export them manually before you switch.

Transferring your number to a different carrier

Start with your new carrier, not your old one. Visit their store, call their customer service line, or go to their website and look for "switch carriers," "port your number," or "bring your number." Tell them you want to transfer your existing number from your current carrier.

The new carrier will ask for your account number, billing phone number, and billing address from your current carrier. They may also ask for a PIN or password if your old carrier has one on file. Provide this information accurately — mismatches will delay or block the transfer. The new carrier then submits the port request to your old carrier on your behalf.

Your old carrier has a set window (usually 24 hours) to approve or deny the request. Once approved, the transfer completes within a few hours to a few days. During this window, your old phone may stop working before your new phone is fully active — this is normal. Keep both phones and both accounts active until you confirm the number is working on the new phone and the new carrier.

What information you'll need from your current carrier

Before you contact your new carrier, gather these details from your current account:

  • Your account number (found on your bill or in your carrier's app)
  • Your billing phone number (the number you're transferring)
  • Your full billing address
  • Your account PIN or password, if one exists
  • The name on the account (must match the name you provide to the new carrier)

If you don't have this information, call your current carrier's customer service before you start the port request. Having it ready speeds up the process and reduces the chance of errors that could delay your transfer.

What happens during the transfer window

Once the port request is submitted, your old carrier has until the end of the next business day to respond. If they approve it, the transfer usually completes within a few hours. If they deny it, they will tell your new carrier why — common reasons include an unpaid balance, a recent plan change, or a mismatch in the account information you provided.

During the transfer, your old phone may lose service before your new phone gains it. This gap can last anywhere from a few minutes to several hours. Text messages and calls sent during this time may not go through. If you need to stay reachable, let people know you're switching and provide an alternate way to reach you (email, a different phone number, a messaging app).

Once your new phone shows service bars and you can make and receive calls, the transfer is complete. Test it by calling someone and having them call you back. Then contact your old carrier and ask them to close the account or downgrade it to a basic plan if you want to keep the number for backup.

Transferring contacts and data to your new phone

Your phone number transfer does not include your contacts, messages, photos, or apps. Back these up before you switch phones using your phone's native backup system. iPhone users can back up to iCloud through Settings > [Your Name] > iCloud. Android users can back up to their Google Account through Settings > System > Backup.

When you set up your new phone and sign in with the same Apple ID or Google Account, your backed-up data will restore automatically. If you're switching from iPhone to Android or vice versa, you'll need to use a third-party tool or manually export your contacts. Both carriers' customer service teams can walk you through this process if you ask.

Troubleshooting a delayed or failed transfer

If your transfer doesn't complete within the expected timeframe, contact your new carrier first. They can check the status of the port request and tell you whether your old carrier approved it. If it was denied, ask your new carrier what the reason was and whether you can resubmit with corrected information.

Common reasons for denial include a mismatch between the name or address you provided and what's on file with your old carrier, an unpaid balance on the old account, or a recent plan change that locked the number temporarily. If the old carrier is refusing to release the number, ask your new carrier whether they can file a complaint with the FCC on your behalf — carriers are required to port numbers unless there's a legitimate reason to refuse.

Frequently Asked Questions

Can I transfer my number if I have an unpaid balance with my current carrier?

Most carriers will not port your number if you owe money. Contact your old carrier, pay the balance, and then request the port from your new carrier. Some carriers may require proof of payment before they approve the transfer.

What if I'm switching from a prepaid phone to a contract phone?

The process is the same. Your new carrier will request the port from your old carrier regardless of the plan type. Make sure you have your prepaid account number and billing information ready when you contact the new carrier.

How long does a number transfer usually take?

Most transfers complete within a few hours to a few days. The exact timeline depends on how quickly your old carrier processes the request and your new carrier activates the service. Some carriers complete transfers same-day; others take up to five business days.

Will I lose my text messages and voicemails during the transfer?

Text messages and voicemails stored on your old phone will stay there unless you back them up first. Voicemails stored by your carrier may be lost. Back up your phone before you switch, and ask your old carrier whether they can forward voicemails to your new number during the transfer window.

Can I keep my old phone number if I switch to a different country?

International transfers are complicated and not always possible. Contact your new carrier in the other country and ask whether they can port a US number. Many carriers outside the US cannot accept US numbers, or they charge extra fees. You may need to get a local number instead.