1. Can I use more than one device for the authentication
Yes, but it needs to be configured together during the initial setup. If is not, administrator will need to reset 2FA for the employee and re-do the set up for all the devices
2. If I use more than one device, am I able to use different authenticator?
Yes, it will still display the same code even though you are using a different authenticator.
3. What should I do if I lost my device and I only set up on one device?
You need to inform the administrator to reset for you and you need to set up again on the new device
4. If I accidentally remove the authenticator, and re-install the authenticator. What should I do?
You need to inform the administrator to reset for you and you need to set up again.
5. If the staff who holds ‘master’ account has left the organization and no one else know the password, what can be done?
Contact Frontier Customer care for the resetting of 'Master' password