As each partner has a different website address, and different login credentials, switching broker on mobile would require logging out and log in again in order to switch accounts. We are working on easier switching between partners, however, the process is pretty straightforward.
Click on the Menu icon at the bottom left of the screen, then clock on Settings:
Go back from the login menu:
Go back again:
Then you will get to the lobby, where you can choose a broker:
After choosing a broker you will be directed to the login screen. Make sure to submit the correct credentials for this broker.