Logging in with SMS (Text) Messages
Instructions
Enter your username and password into the Trading Platform or Portal login screen and click Login.
You will then be prompted to enter the authentication code sent to you via SMS. Please open your mobile phone's messages app and look for the message containing the code.
Enter the authentication code in the Security Code field present on the login screen, and then click Login or OK.
Additional Resources
Learn About Two Factor Authentication for iPhone at IBKR Campus
Learn About Two Factor Authentication for Android at IBKR Campus