Use an authenticator app with a recovery function. Some 2FA authenticator apps let you back up the sites you entered into them, which allows you to restore your authenticator access on a new device, if your phone is no longer accessible or you’ve deleted the app. Each authenticator app handles backups a little differently. Our top pick, Duo Mobile, stores its backup in iCloud or Google Drive, depending on your platform, and it secures its backup with a special password you need to retrieve it. Google Authenticator, meanwhile, is attached to your Google Account and can sync accounts across devices.