If you have not yet installed your Mobile Login with mTAN (code sent by SMS) you first have to log in with a smart card.
Then you can install the Mobile Login (mTAN) under "Settings / Logins / Add a new login Type".
MOBILE LOGIN (mTAN)
Please start by entering your username and password.
Choose your login method
Remark: For logins with smartcards, you first have to insert your smart card into the reader before clicking on the logo of your card type.