How to transfer Google Authenticator (Duo Mobile) to your new phone

Google Authenticator — the app formerly called Duo Mobile — generates security codes for your accounts. When you switch phones, you need to move it before you lose access to those codes. The process depends on whether you set up a backup when you first installed the app. If you did, you can restore everything to your new phone in minutes. If you didn't, you'll need to re-add each account one at a time using the original setup codes or your backup methods.

The fastest path is to check your old phone right now for a backup code or recovery option. If neither exists, contact the services you protected (your email provider, bank, social media accounts) and ask them to disable two-factor authentication temporarily so you can re-enable it on your new phone. This takes longer but keeps you from being locked out.

Key Takeaways

  • Google Authenticator can restore all your accounts automatically if you enabled backup during setup, which syncs to your Google account.
  • Without a backup, you must re-add each account manually using the QR code or setup key from the original service.
  • If you can't access the setup codes, contact each service's support team and ask them to disable two-factor authentication so you can turn it back on from your new phone.
  • Save your recovery codes or backup keys in a secure place before you switch phones, so you never face this problem again.

Check whether you have a backup set up

Open Google Authenticator on your old phone and look at the top right corner. If you see a profile picture or initial, you have a backup enabled. Tap it to confirm — you should see "Backup enabled" or a similar message. This means all your accounts are already stored in your Google account and can be restored to any new phone where you sign in.

If you don't see a profile picture or the menu says "Backup disabled," you have no automatic backup. Write down how many accounts you see in the app — you'll need to re-add each one. Before you do anything else, check whether any of those accounts have recovery codes or backup methods saved elsewhere. Many services (Gmail, Microsoft, GitHub, Authy) give you a list of one-time backup codes when you first turn on two-factor authentication. Look for an email with the subject line "recovery codes" or "backup codes" from any of those services.

Restoring from backup on your new phone

Install Google Authenticator on your new phone from the Google Play Store (Android) or App Store (iPhone). Open the app and tap the profile picture in the top right corner. Select "Sign in with Google" and enter the same Google account you used on your old phone. The app will ask for permission to restore your backup — tap "Restore."

All your accounts should appear within a few seconds. Verify that you see the same number of accounts and the same names as on your old phone. Once you confirm everything is there, you can delete Google Authenticator from your old phone. Keep your old phone powered on for at least 24 hours in case you need to check it — don't factory reset it immediately.

Re-adding accounts without a backup

If you have no backup, you need the original setup codes from each service. These are usually QR codes or alphanumeric keys that the service showed you when you first turned on two-factor authentication. Check your email for messages from Gmail, your bank, Microsoft, Apple, or any other service that mentioned "authenticator" or "two-factor." Many services send a confirmation email with a link to view your recovery codes — follow that link and look for the setup key or QR code.

Install Google Authenticator on your new phone. Tap the plus sign (+) to add an account. Choose "Enter a setup key" and paste the alphanumeric code from the service, or choose "Scan a QR code" if you have a photo of it. Repeat this for every account. This process is slow if you have many accounts, but it's the only way forward if you have no backup and no recovery codes.

What to do if you can't find the setup codes

Contact the support team for each service you protected with two-factor authentication. Tell them you're switching phones and need to disable two-factor authentication temporarily. Most services will ask you to verify your identity using your password, recovery email, or security questions. Once they disable it, you can turn it back on from your new phone using a fresh QR code or setup key.

This route takes longer — expect one to three business days per service — but it's the only option if you have no backup and no recovery codes. Start with your most important accounts first (email, banking, password manager). Once you've re-enabled two-factor authentication on your new phone, write down or screenshot the recovery codes the service gives you, and store them in a secure place like a password manager or a locked drawer. This prevents the same problem from happening again.

Preventing this problem in the future

Before you switch phones again, enable backup in Google Authenticator. Open the app, tap the profile picture, and look for "Backup" or "Backup settings." Turn it on and sign in with your Google account. This takes 30 seconds and saves you hours of trouble later.

Also save your recovery codes. When you turn on two-factor authentication for any service, that service gives you a list of one-time backup codes — usually 8 to 10 codes you can use if you lose access to your authenticator app. Store these in your password manager (like Bitwarden or 1Password) or in a physical notebook in a safe place. Never store them in your email or on your phone — the point is to have them somewhere you can reach even if your phone is lost or broken.

Frequently Asked Questions

Can I use the same Google Authenticator account on two phones at once?

Yes. If you enable backup, the app syncs across any phone where you sign in with the same Google account. You can use Authenticator on your old phone and new phone simultaneously until you're ready to retire the old one. The codes will be identical on both phones.

What if I don't have a Google account?

You can still use Google Authenticator without signing in, but you won't have a backup. You'll need to manually re-add each account on your new phone using the setup codes. Consider creating a Google account just for this purpose — it takes two minutes and gives you a backup you can restore anytime.

Can I transfer my accounts to a different authenticator app?

Yes, but only if you have the original setup codes. Most authenticator apps (Authy, Microsoft Authenticator, 1Password) can import accounts from Google Authenticator if you have the QR codes or setup keys. If you don't have those codes, you'll need to contact each service and ask them to generate new ones.

What happens if I lose my phone before I transfer Authenticator?

You'll be locked out of any account that uses two-factor authentication with that app. This is why recovery codes exist — if you saved them, you can use one to regain access. If you didn't save recovery codes, contact the service's support team and verify your identity using your password, recovery email, or security questions. They can disable two-factor authentication so you can turn it back on from a new phone.

Do I need to do anything on my old phone after I restore to the new one?

No, but you can delete Google Authenticator from your old phone once you've confirmed all accounts appear on the new one. Wait at least 24 hours before you do this, in case you need to check the old phone. If you're selling or recycling the old phone, factory reset it after you've confirmed the transfer is complete.