1，What is a description file? Why install it?

The description file is certified by Apple and is used to record the user's device. Please feel free to use it. The installation description file is used to register your device with the Apple user library. Is a prerequisite for installing Apple apps.

2，The installation process is stuck in the Settings page, how to solve?

Catton is a bug in iOS. Solution: Double-click on the bottom of Home/ slide up - slide off the Settings page - reinstall.

3，Why do I need to enter the password when installing the description file? What password do you enter?

To confirm that the device owner is operating, enter the "unlock password" when installing the description file.