How to Change, Add or Remove a Phone Number on Twitter (X)

If you need to change phone number on Twitter (X), the process is short: the setting sits under Account information, you confirm your password, and X checks the new number with a one-time SMS code. What makes it worth a careful read is that the number does more than most people expect. It can support account verification, text-message login checks and the "find me by phone" feature, so the order in which you do things matters.

This guide explains how X uses a phone number, where to find the setting on web, iOS and Android, how to add or replace a number, what changes when you remove one, and how to fix the two most common problems: "phone number already in use" and an SMS code that never arrives. If you work with phone-verified aged accounts, you will also see how this setting relates to the Phone Verified Aged Accounts category in the store.

How X uses a phone number on an account

A phone number on an X account usually plays three roles. Knowing which ones you rely on tells you how careful to be before you change anything.

• Verification and trust. Adding and confirming a number is one of the ways an account becomes "phone verified". The details of how that label is used in listings are covered in what phone verified means in a listing.
• Login and recovery checks. X can send a code by SMS when it wants to confirm that you are the person signing in. Which accounts can use text-message two-factor authentication depends on X's current rules, so the option may or may not appear for you.
• Discoverability. Depending on your privacy settings, people who already have your number in their contacts can be matched to your profile.

Your number is not shown on your public profile. It is only visible inside your own settings, and X masks most digits even there.

Where the phone setting lives on web and mobile

The path is almost the same everywhere. Labels shift between app versions, so follow the wording on your screen.

On the web (x.com)

• Open Settings and privacy from the left menu (the "More" entry on narrow windows).
• Choose Your account, then Account information.
• Enter your password when X asks, then pick Phone.

On the iOS or Android app

• Tap your profile picture, then Settings and privacy.
• Go to Your account, then Account information.
• Confirm your password and tap Phone.

If you do not see a Phone entry at all, the account may be showing a restricted view because of a login challenge or a temporary lock. Resolve that first, using how to unlock a temporarily locked account.

Add or change a phone number step by step

Adding and changing a number use the same screen. With a number on file the button reads something like Update phone number; without one it reads Add phone number.

Before you start

• Pick a number you can receive SMS on right now, with signal or Wi-Fi calling working.
• Make sure you can sign in with something other than the phone, such as an authenticator app, so one lost message cannot lock you out.

The steps

• Open Account information and select Phone as described above.
• Choose Add phone number or Update phone number.
• Select the country code, then type the number without extra punctuation. In many countries you leave out the leading zero.
• Tap or click Next, then type the numeric code X sends by SMS.
• Reopen the Phone screen and check that the masked digits match the number you entered.

Remove a phone number and what stops working

On the same Phone screen there is an option to delete the number. Before you use it, think through what depended on it.

• SMS-based checks that relied on the number will no longer have a place to send codes. If text-message login was your only second factor, set up an authenticator app first. The 2FA code generator can produce a one-time code from a 2FA secret if you work from a secret rather than a phone app, and what a 2FA secret key is explains the format.
• Phone-verified status is the part to treat carefully. X does not publish a simple rule for what happens to that label after a number is deleted, and no outcome can be promised for any individual account. If your plans depend on a phone-verified account, replace the number rather than leaving the account without one.

For a delivered account, the phone number is not normally one of the fields in the order file, which usually holds login, email and token details that vary by category. Open Account information after signing in to see what X actually shows for that account, and use the account checker when you want a bulk status read on several logins at once.

When the number is already in use or the code never arrives

"This phone number is already in use"

X limits how many accounts can be linked to a single number. The message means the number you typed is already attached to another account, which may be one of your own that you forgot about.

• Sign in to the other account, if you control it, and remove the number there first.
• Try again with a different number that you control.

The SMS code does not arrive

Work through the simple causes first, in this order:

• Confirm the country code and number, then request the code once and wait a couple of minutes.
• Check signal, airplane mode, do-not-disturb filters and any blocked-sender or spam-filter list on the phone.
• Remember that some virtual and internet-based numbers cannot receive messages from short codes at all, so a physical SIM or a carrier-backed line is the reliable choice.
• Avoid pressing resend repeatedly. Too many requests in a short time can trigger a temporary cooldown that makes the delay longer.

The same troubleshooting logic applies to login codes, which are covered in verification codes that do not arrive. If a two-factor code is rejected rather than missing, see fixing a 2FA code that is not working.

Control whether people can find you by phone

Separate from the number itself, X has a discoverability setting. It lives under Settings and privacy, then Privacy and safety, then Discoverability and contacts. There you can allow or block other people from finding your account by the phone number they have for you.

For a marketing, agency or brand account, switching this off is usually the sensible default. It keeps the account out of contact-sync suggestions, and it does not stop X from using the number for verification.

A practical wrap-up: decide what the number is for, change it in the order that never leaves the account without a working second factor, and verify the result by reopening the Phone screen. If you are choosing an account where a confirmed number matters, browse the Phone Verified Aged Accounts hub and compare it with the other categories before you order.

Frequently asked questions

Can one phone number be used on several X accounts?

Not without limits. X restricts how many accounts can share a number, and when the limit is reached you see an "already in use" message. Remove the number from the other account or use a different number.

Does removing the phone number affect the account's phone-verified status?

X does not publish a clear rule, so no outcome can be promised. If the status matters to you, replace the number instead of leaving the account without one, and read what phone verified means in a listing.

Do I need a phone number to use 2FA on X?

No. Authenticator-app codes and security keys work without a phone number. Text-message 2FA depends on a number and on what X currently offers for your account.

Why is my SMS verification code not arriving?

The usual causes are a wrong country code, no signal, spam or blocked-sender filters, a virtual number that cannot receive short-code messages, or too many resend requests in a row. Check each one, then request a single new code.

Is my phone number visible on my public profile?

No. The number is shown only in your own Account information, with most digits hidden. The discoverability setting controls whether others can match you by phone, not whether the number is displayed.