Problems with two factor authentication risks

losing access to your accounts is the biggest risk of enabling two-factor authentication.
If you lose your phone, you lose access to the two-factor authentication app.

In order to recover your two-factor authentication app and get back into your accounts, you need :
- access to the backup codes most sites provide when you enable two-factor authentication
- access to another device with the app installed
- where you’ve manually scanned all the same QR codes,
- or access to a Web-based backup (something that most two-factor authentication apps provide but that most experts recommend against).

If you don’t take the required measures for a potential account recovery during the setup process, you could be permanently locked out of any account on which you enable two-factor authentication.