Answer: The device can be accessed at home but cannot be accessed outside. There may be two situations as follows:
a. The WiFi device is connected, but it’s not connected to the network. Please check the Wi-Fi connected to the internet; it works normally.
b. The APP does not have permission to use the mobile phone’s 4G data. The mobile phone can only access the device when connected to WiFi. In this case, you can open the permission to use the app’s 4G data in the APP permission setting on the phone.