What is the difference between the Main Password and mulitple password?

The Main Password and mulitple password have absolutely the same function. They both let you access your device but with different home screen.

The main password allows you to have access to all the content in your device while mulitple password allows access to partial content of your device. The main password is like a gate through which you’re able to see every corner of this house. mulitple password, however, looks like a gate but it isn’t. It cuts one small part of the house to make you believe you’re seeing the whole house.

The main password is the only key to your device and once it gets lost, all your personal information will be in great danger. However, mulitple password is a public key that anyone can enter the device because the core data is well locked. Even if it gets lost or remembered by others, there’s no need to worry about the security of your data.