The fastest way to move your phone number is through your carrier's website or by calling them directly

Moving your phone number to a new device usually takes between 24 hours and a few days, depending on whether you're switching carriers or staying with the same one. If you're keeping your current carrier, the process is simpler — you activate the new phone and your number transfers automatically or with a quick call. If you're moving to a different carrier, you'll need a transfer code from your current provider before you can complete the switch.

The key is starting with your current carrier first, not your new one. They hold the authorization to release your number, and you can't move it without their permission. Most carriers let you request this online, but a phone call is often faster if you want it done the same day.

Key Takeaways

  • Contact your current carrier before buying a new phone or switching providers — they must authorize the transfer of your number.
  • If you're staying with the same carrier, activate your new phone and your number moves over automatically or with one phone call.
  • If you're switching carriers, request a transfer code (also called an authorization code) from your current provider, then give it to the new carrier.
  • Keep your old phone and service active for at least 24 hours after the transfer completes to make sure nothing gets lost.
  • Back up your contacts, photos, and messages before switching — the phone number transfer doesn't include your data.

Transferring your number when you stay with the same carrier

If you're keeping your current carrier and just getting a new phone, the process is the simplest. Visit your carrier's website, log into your account, and look for an option like "Activate a new device" or "Switch devices." You'll enter the new phone's model and serial number (usually found on the box or in settings), and the system will walk you through activation.

Your number should transfer within a few hours. If it doesn't, call your carrier's customer service line — the number is on your bill or their website. Have your account number and the new phone's serial number ready. They can push the transfer through manually, usually while you're on the phone.

During this time, your old phone may lose service temporarily. This is normal. Keep it powered on and don't remove the SIM card until the new phone is fully activated and you've confirmed your number works on it.

Transferring your number to a different carrier

Switching carriers requires an extra step: you need a transfer code from your current provider. Call them or log into your account online and request an "authorization code" or "transfer code" for your phone number. Some carriers call this a "port authorization code" or "PAC." Write it down or save it in your email — you'll need it within 30 days.

Once you have the code, contact your new carrier. You can do this in person at a store, online, or by phone. Tell them you want to transfer your existing number and provide the code. They'll set up your account and activate your new phone. The transfer usually takes 24 to 48 hours, though it can take up to a week depending on the carriers involved.

Your old carrier will send you a final bill for any remaining balance on your account. Pay it promptly — unpaid balances can delay the transfer or cause problems later. Keep your old phone on and don't cancel the service until your new carrier confirms the number has arrived and is working.

What to do before you switch phones

Back up everything on your current phone before you start the transfer process. Your phone number moves, but your contacts, photos, messages, and apps do not. Use your carrier's backup service (Verizon has Verizon Cloud, AT&T has AT&T Mobile Backup, T-Mobile has T-Mobile Digits), your phone's built-in backup (iCloud for iPhone, Google One for Android), or a third-party app like Backblaze or Carbonite.

Write down or screenshot any important information you might need during the transfer: your account number, PIN or password, the phone numbers of people you call often, and any two-factor authentication codes tied to your phone number. Some services send verification codes to your phone, and if your number isn't working yet, you won't be able to receive them.

If you use your phone number to log into accounts (banking, email, social media), consider switching those to use an email address instead, or at least add a backup phone number or recovery email. This prevents you from getting locked out if the transfer takes longer than expected.

Troubleshooting a transfer that's taking too long

If your number hasn't transferred after 48 hours, contact your new carrier first. They can check the status and see if there's a hold-up on their end. Common delays include a mismatch between the name on your old account and your new one, an unpaid balance on your old account, or a typo in the transfer code.

If your new carrier says the problem is with your old carrier, call them and ask them to manually release your number. Bring your transfer code and account number. Some carriers have a department specifically for port requests, and asking to speak to them directly can speed things up.

If you're stuck between carriers and can't reach anyone, file a complaint with the Federal Communications Commission (FCC). Their Consumer Complaint Center accepts complaints about phone number transfers, and carriers take FCC complaints seriously. You can file online at fcc.gov/consumers.

Moving your data to the new phone

Once your number is working on the new phone, restore your backup. If you used iCloud or Google One, the new phone will prompt you to sign in during setup and will automatically download your contacts, photos, and messages. If you used your carrier's backup service, download their app and follow their restore instructions.

For contacts stored only on your old phone's SIM card, you may need to manually transfer them. On your old phone, go to Contacts, select all, and export to a file (usually a .vcf file). Email it to yourself or save it to cloud storage, then import it on the new phone. Android phones often have a built-in transfer tool — look for "Migrate data" or "Switch device" in Settings.

Test a few things before you consider the switch complete: make a call, send a text, check that your voicemail works, and confirm that two-factor authentication codes arrive on your new number. Once everything is working, you can safely power off your old phone.

Frequently Asked Questions

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

Yes, you can transfer your number even with an outstanding balance. However, some carriers may delay the transfer until you pay, so it's worth settling the bill first if you want the process to move quickly. Your old carrier will send you a final bill after the transfer completes.

What happens to my old phone after the transfer?

Your old phone loses service once the number is fully transferred to the new one. You can still use it on Wi-Fi to access apps, email, and stored photos. Some people keep their old phone as a backup or sell it. If you're recycling it, wipe all data first by doing a factory reset.

How long does a phone number transfer usually take?

If you're staying with the same carrier, it can happen within hours or even instantly. If you're switching carriers, expect 24 to 48 hours, though it can take up to a week. Weekends and holidays may slow things down. Your new carrier can tell you a more specific timeline when you start the process.

Do I need to keep my old SIM card in my old phone during the transfer?

Yes, keep your old phone powered on with the SIM card in place for at least 24 hours after starting the transfer. This ensures your old carrier can communicate with you if there are any issues, and it prevents service interruptions. Once your new phone is confirmed working, you can remove the SIM card.

What if my new carrier says they can't transfer my number?

This is rare but can happen if your old account is in someone else's name, if there's a billing dispute, or if your old carrier won't release the number. Contact your old carrier and ask why the transfer is blocked. If it's a name mismatch, you may need to update your account. If it's a billing issue, pay what you owe. If the carrier is simply refusing, the FCC can intervene.