RE: 1) You can disconnect the power to the Bilantan device, then turn it back on and wait for the device to come online automatically. If the device is not connected to the Internet, you can try to reconfigure the Bilantan camera's network or use a network cable to connect to the network. 2) If the device is still not connected to the Internet, please provide the Bilantan device ID, firmware version information and router model number, and contact Bilantan customer service. 3) If it is a 4G device, please make sure the data card still has traffic and the data card is not violating the binding. You can go to their website and ask the card dealer.