天蓬老师2017-04-18 09:37:11
First make sure the device is connected to the Internet and can access the webpage normally
Change the date and time in settings to 自动, and wait a few seconds for the system to automatically obtain the time.
Exit "Settings" in the background, then re-enter "Settings" and click "Trust"
If it still doesn’t work, disconnect WiFi and try again using 4G. If the iPad is not a 4G version, use your iPhone to turn on 4G to create a WiFi hotspot, let the iPad connect to this hotspot and then click Trust.
