What changing your phone number actually means
Changing your phone number is not one action — it is several separate ones, and which ones you need depends on why you are changing it. If your carrier is switching you to a new number, they handle the technical part on their end. If you are keeping the same number but moving to a different carrier, you request a port, which moves your number to the new company. If you are straightforward updating your number in your apps and accounts because you got a new phone or switched carriers, you go into each service one by one and change the number on file.
The confusion happens because people use "change my phone number" to mean three different things: getting a new number from your carrier, moving your existing number to a new carrier, or updating the number stored in your online accounts. Each one works differently and takes different amounts of time.
Key Takeaways
- If your carrier is giving you a new number, they do this on their network — you do not have to do anything except tell your contacts the new number.
- If you want to keep your number when switching carriers, you request a port from your new carrier, which usually takes one to three business days.
- If you already have a new number and need to update it in your accounts, you change it in each service separately — email, banking, social media, and any two-factor authentication settings.
- Two-factor authentication tied to your old number is the biggest problem: you may lose access to accounts if you do not update it before the old number is disconnected.
Getting a new number from your current carrier
If you are staying with the same carrier and they are assigning you a new number, contact them by phone, through their app, or in person at a store. Tell them you want a new number. They will process this on their network, and your new number becomes active within hours or sometimes when ready. You do not have to do anything on your phone — the carrier handles it.
After you have the new number, you are responsible for telling everyone who needs it. Text or call your contacts, update your voicemail greeting, and change the number in any online accounts that have it on file. This is the step people forget, and it is why updating your accounts matters.
Keeping your number when you switch carriers
If you are moving to a different carrier and want to keep your existing number, you request a port. Start with your new carrier — they will ask for your account number and PIN from your old carrier, which you can find on your bill or by calling them. Your new carrier then submits the port request to your old carrier.
The port usually takes one to three business days. During this time, your old carrier may cut off service before the port completes, or your new carrier may set up service before the port finishes — this varies. Once the port is complete, your number works on your new carrier's network and stops working on the old one. You do not need to update your number in your accounts because it is the same number.
Keep your old phone and old carrier active until the port is completely done. If something goes wrong and the port fails, you need the old service to stay connected.
Updating your number in email and banking
Once you have a new number, go into each account that has your phone number on file and change it. Start with email and banking because these are the accounts that protect access to everything else.
For email (Gmail, Outlook, Yahoo, or whatever you use), sign in, go to Account Settings or Security, find the phone number field, and replace it with your new number. The service will usually send a verification code to your new number to confirm the change. For banking, sign into your online account or call the bank directly — most banks let you change it online under Account Settings or Security, but some require a phone call.
Do this before you cancel your old phone service, because the verification code goes to your new number and you need to receive it to complete the change.
Updating two-factor authentication on your accounts
Two-factor authentication (2FA) is when a service sends a code to your phone to verify it is really you logging in. If your 2FA is tied to your old number and you disconnect that number without updating it first, you will be locked out of those accounts.
Go through your most important accounts — email, banking, social media, work accounts — and check which ones have 2FA set to text message. In the security settings, remove the old number and add your new one. Some services will send a verification code to your new number; others will ask you to confirm the change in a different way.
If you have already disconnected your old number and lost access to an account, you will need to use a backup method to get back in. Many services offer backup codes (a list of one-time codes you save when you set up 2FA) or a backup phone number or email address. If you have neither, contact the service's support team and be ready to verify your identity another way.
Updating your number in apps and other services
Go through your phone and think about which apps have your number on file. This includes messaging apps (WhatsApp, Signal, Telegram), social media (Instagram, Facebook, Twitter), dating apps, ride-sharing apps, food delivery apps, and any other service that uses your phone number to identify you.
For most apps, go to Settings or Account within the app, find the phone number field, and change it. Some apps will ask you to verify the new number by sending a code. Others will straightforward update it. If an app is tied to your email address instead of your phone number, you do not need to change anything.
This is less urgent than email and banking, but it is worth doing so that people can reach you through the correct number and so you do not lose access if the app ever requires re-verification.
What to do if you need your old number back
If you got a new number and realized you made a mistake, contact your carrier as soon as possible. Some carriers will reassign your old number to you if it has not been reassigned to someone else yet. This window is usually 30 to 90 days, but it varies by carrier. Call and ask — the worst they can say is no.
If your old number has already been reassigned, you cannot get it back. This is why it is important to update your accounts and tell your contacts quickly: the longer you wait, the more likely your old number gets given to someone else.
Frequently Asked Questions
Do I lose my text messages and call history when I change my number?
Yes. Your text messages and call history are stored on your phone, not tied to your phone number. When you change your number, the old messages stay on your phone, but new messages come to your new number. If you want to keep old messages, back up your phone before you change the number.
What happens to my old number after I stop using it?
Your carrier recycles it and eventually assigns it to someone else. This usually happens 30 to 90 days after you stop using it. This is why updating your accounts matters: if someone gets your old number, they might receive codes meant for your accounts if you have not updated them yet.
Can I change my number without switching carriers?
Yes. Call your carrier and ask for a new number. They will assign you one, usually within hours. You then update your number in all your accounts and tell your contacts. There is no charge for this in most cases, but some carriers may charge a small fee.
What if I port my number but the port fails?
If the port fails, your number stays with your old carrier and your new carrier will assign you a temporary number instead. Contact your new carrier to find out why it failed — common reasons are a wrong account number, an active dispute with the old carrier, or a billing issue. Once you fix the problem, you can request the port again.
Do I need to tell my bank I am changing my number?
You should update your number in your bank's system so they have the correct contact information. You do not need to call and announce it, but go into your online banking and change it in the account settings. This ensures they can reach you if there is fraud or an issue with your account.