Download the app on another phone. Click on "Log in" : you will be asked to go trough the ID verification process. Make sure you have your identity document on hand so we can verify it's really you.
Once you log in on another smartphone, please unpair the stolen or lost device from the application. In order to unpair your phone you need to click on the person icon in top right section of the dashboard, select "Settings" -> "Security"-> "Unpair phone".