Got a New Phone? Don't Lose Your Authenticator Codes!

The quick answer

Do not erase or trade in the old phone until you've tested your important authenticator accounts on the new one. Backups may restore some one-time password codes, but not every work, school, or device-bound account.

Before switching phones

1. Open each important account's Security settings on a device you trust.
2. Confirm you have a working backup sign-in method and safely stored recovery codes.
3. Check whether your authenticator app has an enabled backup or transfer feature.
4. Keep the old phone powered and accessible while you test sign-ins on the new device.

Microsoft Authenticator has special rules

Microsoft says eligible personal and third-party one-time password accounts can be backed up. Work and school account credentials aren't backed up the same way; after restoring, you may need to sign in and register them again. Microsoft Authenticator backup restore also works only between the same device type—Android to Android or iOS to iOS.

Where do the replacement QR codes come from?

Usually from the Security or Two-step verification page of the account itself—not from the old authenticator's code list. Add or change an authenticator method, follow the provider's instructions, and scan the new QR code with the new phone. For work or school Microsoft accounts, your organization may manage security registration and require admin assistance.

Test each account, not just the app

Open the new authenticator and attempt a legitimate sign-in for your important services. Make sure approval prompts and time-based codes work. An account name appearing in the app does not guarantee the registration has been fully restored.

If the old phone is already gone

Use your saved recovery codes, alternate verification method, or the provider's official recovery process. Don't pay a stranger to 'recover' authenticator codes or share a one-time code with anyone offering help.

References: Microsoft: Back up authenticator accounts and Restore credentials.