The second step
An app for the one-time code
It shows a new six-digit code every 30 seconds. Any of these will do — they all work the same way, install one on your phone.
- Google Authenticator
- Microsoft Authenticator
- Authy
- 2FAS
iPhone — App StoreAndroid — Google Play
Search by name, the apps are free. The code needs no internet — it is calculated on the phone itself.
Full guide with pictures