How to move your number when you get a new phone

Transferring your phone number to a new device depends on whether you're staying with the same carrier or switching to a different one. If you're keeping your current carrier, the transfer usually happens automatically when you activate the new phone — the carrier moves your number from the old device to the new one without you having to do much. If you're switching carriers, you'll need to request a port (the technical term for moving a number between carriers), which takes a few days and requires information from both your old and new carrier.

The process itself is straightforward, but timing matters. You want to make sure your old phone stays active until the new one is fully set up, and you need to know what documents and account details to have ready. Most carriers can walk you through it by phone, and many let you start the process online.

Key Takeaways

  • Staying with your current carrier: activate your new phone and the number transfers automatically, usually within hours.
  • Switching carriers: request a port from your new carrier, which takes two to five business days and requires your account number and PIN from your old carrier.
  • Keep your old phone active until the transfer is complete, because losing service on the old device can interrupt the process.
  • Have your old carrier's account number, billing phone number, and account PIN ready before you start, whether you're porting or staying.
  • Text messages and voicemails do not transfer automatically — back them up before switching if they matter to you.

Transferring your number to a new phone with the same carrier

When you stay with your current carrier and buy a new phone, the number transfer is built into the activation process. You go to a store, order online, or call the carrier, and when you activate the new device, the carrier automatically moves your number from the old phone to the new one. This usually takes a few hours, sometimes less.

The carrier will ask you to verify your identity — usually by confirming your account PIN, the last four digits of your Social Security number, or a code sent to your email or existing phone. Once verified, they activate the new phone on your account and deactivate the old one. Your number rings on the new device, and the old one stops working for calls and texts.

You don't need to do anything special to prepare, but it helps to have your account PIN ready. If you don't know it, call your carrier before you go in or order, and they can reset it or tell you what it is. Keep the old phone powered on during the transfer — if it dies or loses service before the process completes, it can cause delays.

Switching carriers and taking your number with you

Moving your number to a different carrier is called porting. The new carrier handles most of the work, but you need to provide information from your old carrier's account. Start by contacting your new carrier — by phone, in person, or online — and tell them you want to port your existing number. They'll ask for your old carrier's account number, your billing phone number (the number on your account), and your account PIN or password.

The new carrier then submits a port request to your old carrier. Your old carrier has to approve it, which usually takes one to three business days. During this time, your old phone keeps working normally. Once approved, the port completes — usually overnight — and your number rings on the new carrier's network. The old carrier then closes your account or converts it to a different number if you had multiple lines.

The entire process typically takes two to five business days from the moment you request it. Some carriers offer expedited porting that can complete in hours, but standard porting is the default. Avoid canceling your old account yourself; let the old carrier close it automatically after the port completes, because canceling early can interrupt the transfer.

What information you need from your old carrier

Before you contact your new carrier to port, gather these details from your old carrier's account:

  • Account number: The number assigned to your account, usually on your bill or in the carrier's app.
  • Billing phone number: The phone number associated with your account (the one you're porting).
  • Account PIN or password: A security code you set up, or your account password. If you don't have it, call your old carrier and ask them to reset it or provide it to you.
  • Billing address: The address on file for your account. The new carrier will verify this matches what you provide.

You can find most of this on your carrier's website or app, or by calling customer service. Have it written down before you contact the new carrier, because they'll ask for it all at once and it speeds up the process.

What happens to your old phone after the transfer

Once the port completes and your number is active on the new carrier's network, your old phone loses service. It can no longer make calls or send texts on that number. However, it can still connect to Wi-Fi and use apps that don't require a phone number, like email, messaging apps, or social media.

If you want to keep using the old phone as a backup or give it to someone else, you have options. You can keep it on Wi-Fi for emergency calls (most phones can dial 911 even without active service). You can also port a new number to it from your new carrier, or sell it and let the buyer activate it on their own account. The old phone itself is not locked to your number — it's just a device that needs a carrier and a number to work.

Before you hand off or recycle the old phone, back up any text messages, voicemails, or photos you want to keep. These don't transfer automatically to the new phone, even if you're using the same carrier.

Backing up your data before switching phones

Your phone number transfers, but your personal data does not. Text messages, voicemails, photos, and contacts stay on the old phone unless you back them up first. Most people use their carrier's cloud backup or their phone's built-in backup (iCloud for iPhone, Google Drive for Android) to move everything to the new device.

For text messages and voicemails specifically, options vary by carrier and phone type. Some carriers offer backup through their app; others don't. If you want to keep old texts or voicemails, check your carrier's website or call them before you switch to see what's available. For contacts and photos, your phone's native backup (iCloud or Google) usually handles this automatically if you're signed into your account.

The port itself — moving your number — doesn't affect your data. You can back up and restore whenever you want, before or after the transfer. But if you wait until after the port completes, your old phone will have lost service, so you'll need Wi-Fi to back up anything left on it.

Troubleshooting common problems during a port

Most ports go smoothly, but a few things can go wrong. If your old carrier denies the port request, it's usually because your account has an outstanding balance, you're still under contract, or the account information you provided doesn't match their records. Call your old carrier to ask why it was denied and fix the issue — usually paying the balance or waiting out a contract period — then request the port again.

If the port takes longer than five business days, contact your new carrier's customer service. They can check the status with your old carrier and push for completion. Delays sometimes happen when account information doesn't match exactly or when your old carrier is slow to respond, but five days is the outside limit for standard porting.

If your number doesn't ring on the new phone after the port completes, restart the new phone and wait a few hours. Sometimes it takes time for the network to fully update. If it still doesn't work after a day, call your new carrier — there may be a technical issue on their end that needs fixing.

Frequently Asked Questions

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

Most carriers will not approve a port if you have an unpaid balance on your account. You'll need to pay what you owe first, then request the port. Some carriers may let you port and keep the balance separate, but this is rare — call your old carrier to ask before you assume you can port.

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

Prepaid numbers can be ported to contract plans and vice versa. The process is the same — you provide your old carrier's account number and PIN to the new carrier, and they request the port. Prepaid accounts work just like contract accounts for porting purposes.

Do I lose my voicemails when I port my number?

Yes, voicemails stay on your old carrier's system and are not transferred. Before you port, call your voicemail and save any messages you want to keep by recording them or writing them down. After the port, your new carrier sets up a new voicemail box on their system.

How long does it take to port if I'm switching from a small carrier to a major one?

The time is the same regardless of carrier size — typically two to five business days. Smaller carriers sometimes take longer to respond to port requests, but the legal limit is still five business days. If it takes longer, contact your new carrier and ask them to follow up.

Can I port my number back to my old carrier if I change my mind?

Yes, you can port back anytime. There's no lock-in period after a port completes. Just contact your old carrier, provide your new carrier's account information, and request the port back. It takes the same two to five business days.