Authenticator Apps: Setup, Backup and Moving to a New Phone
An authenticator app generates short-lived codes on your phone. It is stronger than SMS and works offline.
Setting up
- Open the security settings of the service and choose authenticator app.
- Scan the QR code with your app.
- Enter the six-digit code to confirm.
- Save the recovery codes the service provides.
Backups
Choose an app that supports encrypted backups or transfers, and consider storing the setup key in your password manager if you are comfortable with that trade-off.
Changing phones
Transfer accounts before wiping the old phone. Then test each important login.
Common mistakes
- Not saving recovery codes.
- Relying on one phone only.
- Taking a screenshot of QR codes and leaving it in photos.
Key takeaway: Set up authenticator apps carefully, keep recovery codes and test before replacing a phone.
