For example, the mobile phone prompt: Safari browser unable to install the description file, because an unknown error occurs, you need to go to the configuration - click "Install" in the downloaded description file.

To download the app, you must first download the "app download assistant", which will guide you to complete the download and installation.

1、After opening the description file download link, there will come out "this website is trying to open Settings to allow a configuration description file to you", click "allow";

2、Next, the interface of installation description file will pop up, click "install" in the upper right corner, enter "lock screen password" of the device, and then complete the process according to the prompt;