If your Cam can't be controllable through 4G or other Wi-Fi, please try the following troubleshooting steps to verify if the issue can be resolved.
1. If you can only control the device when connected to your home's Wi-Fi, and you can't control it with 4G or other Wi-Fi, it means that there is a problem with the connection between the router in your home and the external network. Therefore, the device failed to communicate with our cloud, so it can only operate normally in the local area network (when you connect your home Wi-Fi, you are using the local area network to control the device).
2. If the device is online normally, please check if your mobile phone has enabled mobile data permissions for the Apps.
iPhone: Settings—Cellular—Find App—Enable Cellular Network
Android phone: Settings—Data Traffic Management—Application Connections—Find App—Enable Mobile Data
3. Please restart the router and reset the camera and reconnect it again to check this situation
If you still have questions, please contact customer support for further assistance.