How do I use two-factor IBKR Mobile Authentication?
Use IBKR Mobile Authentication (IB Key) for secure two-factor authentication when logging in. If you are an existing IBKR client and have already activated IBKR Mobile Authentication (IB Key) via IBKR Mobile, you do not have to take any action. Once IBKR Mobile Authentication (IB Key) has been activated on your mobile device, it will authenticate your login from both IBKR apps…
Do I need to reactivate IBKR Mobile authentication if my phone number has changed?
If you changed your mobile phone number but you did not change your smartphone device, you do not need to reactivate your IBKR Mobile Authentication (IB Key).