How to Use an Old Phone Number for Verification

By Alex Carter, Editor at GetVerifyCode

You can use an old phone number for verification only if it is still active and still gets your texts or calls. If it is, sign in with the code, then switch the account to your current number. If you no longer have the old number, you can't receive codes there, so use a backup method or account recovery instead.

Key facts

• Google says that when you add or change a recovery phone number, it may take up to 7 days for the change to take effect.
• Google says that if you change your recovery info, it may send codes to your previous info for 7 days.
• Google advises against using a Google Voice number as a recovery phone, because you could lock yourself out of your account.
• Google lists backup options for a lost phone, including another signed-in phone, another number added in 2-Step Verification, a saved backup code, a security key or a passkey.

If you still have the old number

This is the easy case. If the old SIM still works in any phone, or the number is still on an active plan, the code arrives as normal:

1. Put the old SIM in a phone that can receive texts, or keep the old line active for now.
2. Sign in to the account and request the code to the old number.
3. Enter the code while it is still fresh. Our guide to codes that never arrive helps if it doesn't show up.
4. Once you're in, go to the account's security settings and replace the old number with your current one.
5. Turn on a second backup method, such as backup codes or an authenticator app, so you don't depend on one number again.

Do this before you cancel the old plan. Once a line is cancelled, you lose the codes that go to it.

If you lost the old number

If the number is cancelled, lost or no longer yours, codes sent to it won't reach you. Don't try to get the number back from whoever has it now, and don't ask anyone to forward codes. Use the account's own options instead:

• Choose "Try another way" on the sign-in screen. Many services offer email, a backup code, an authenticator app or a prompt on a signed-in device.
• Use another device that is already signed in. For Google accounts, Google's 2-Step Verification help lists another signed-in phone, another number you added, a saved backup code, a security key or a passkey.
• Start account recovery. Each service runs its own recovery form and decides what proof it needs.
• Contact support. For banks and other financial accounts, update your number only through the bank's own app, website or branch, never with a temporary number.

If a service says the number is linked to another account, see our guide on a phone number already used on another account.

Why Google keeps sending codes to your old phone

If you recently changed your number, Google may still be using the old one on purpose. Google's recovery options page says that when you change your recovery info, Google may send codes to your previous info for 7 days, and a new recovery phone can take up to 7 days to take effect. Google says this lets you quickly secure your account if someone else made the change.

So if Google keeps sending verification to your old phone right after a switch, it is usually that waiting period. Check that the new number is saved, then wait out the 7 days. If you didn't make a change and still get Google codes, read why you got a Google verification code.

How to update your number on key accounts

Change your number while you can still receive codes on the old one. For a Google Account, Google's recovery options page gives these steps:

1. Go to your Google Account and click Security & sign-in.
2. Under "How you sign in to Google," click Recovery phone. You might need to sign in.
3. Next to your number, click Edit, then follow the steps on the screen.

Then work through the rest of your accounts:

• Email accounts first, because they reset everything else.
• Banking, payment and other financial apps, through their own app or support.
• Messaging and social apps that use your number to sign in.
• Shopping, delivery and other accounts that text you codes.

An old number you give up can later be given to someone else, so updating it on your accounts protects you. If you're switching carriers or getting a fresh line, our guide on how to get a new phone number covers doing it without losing access.

Related guides

• How to Get a New Phone Number Without Losing Access
• Didn't Get the Verification Code? 12 Fixes
• Why Did I Get a Google Verification Code?
• What Is Two-Factor vs Two-Step Verification?

Use a second number for low-stakes sign-ups

Keep your important accounts on your own number. For one-off, low-stakes sign-ups you won't need to recover later, a second number keeps your personal one private. You can start here and check live prices.

Top up your wallet from $1. Each number is priced live per service and country. Some apps reject virtual numbers. Acceptance is decided by the app, not by us.

Using a temporary number to protect your privacy, travel, or test your own app is generally lawful in many places, but laws differ by country and each app sets its own terms. Check both. Never use it for fraud, impersonation, or getting around a ban.

About the author: Alex Carter is the editor at GetVerifyCode. Alex tests SMS verification routes across services and countries and writes plain-language guides on receiving OTP codes safely.

GetVerifyCode is not affiliated with the apps named in this article. Follow each app's terms and local law.