Phone numbers can only be updated from app.floatfinancial.com. Presently the phone number on the user profile cannot be modified from the Float mobile app.
To add or change your own phone number, log-in to app.floatfinancial.com > Settings > Profile > Edit. You will be prompted to complete a Multi-Factor Authentication challenge using a code sent to your email address as a security measure before editing your profile. After completing the security challenge, make the desired changes and click "Save". Your change will be applied immediately.
As an Administrator, to add or change another user's phone number, log-in to app.floatfinancial.com > Users > click a user > Edit. You will be prompted to complete a Multi-Factor Authentication challenge using a code sent to your email address as a security measure before editing your profile. After completing the security challenge, make the desired changes and click "Save". Your change will be applied immediately.