Two-factor authentication is required to raise your ID level to 2. You have the following two options:
- SMS code
- Authenticator app
Although you can use any Authenticator app, we recommend using the Google Authenticator app. This generates temporary access codes which fulfil the role of the second 'factor'. First you have to scan the QR code generated during login in your Web browser.
Further information about the ID levels can be found here.