If you lose your device, take the following steps:
Download the Quantfury app to your new device;
Log in with your credentials;
Once you're logged into your Quantfury account with your new device, your old device will automatically be logged out.
If you need to update your phone number:
Open the Quantfury app side menu;
Tap your phone number and enter your new number;
A verification code will be sent to your new number;
Enter that verification code to confirm the change.