1. Keep WiFi and Bluetooth on; 2. WiFi and Bluetooth connection distance is within 40 meters of accessibility, beyond which it will not be able to connect, or there are obstacles blocking the signal within the connection range, such as walls, houses, etc., it will also not be able to connect; 

If the smart door lock malfunctions, you can first try replacing the battery or resetting the door lock. 

Hello, Good day! Thank you for your question.  

1.If the camera's current Wi-Fi and Wi-Fi you want to switch can be connected at the same time, you can switch Wi-Fi directly by selecting Wi-Fi network in the settings interface. 2.When the camera is disconnected from the current WiFi, the app will display "Device disconnected". Click Troubleshoot to connect directly to another wireless network. Or remove the camera from the Tuya Smart and then connect the camera to the Wi-Fi you want to switch to. 

1.If the camera's current Wi-Fi and the Wi-Fi you want to switch can be connected at the same time, you can switch Wi-Fi directly by selecting Wi-Fi network in the settings interface. 2.When the camera is disconnected from the current WiFi, the app will show "Device disconnected". Click Troubleshoot to connect directly to a different wireless network. Or remove the camera from Tuya Smart and then connect the camera to the Wi-Fi you want to switch to.