Dear user, sorry for the inconvenience. If you do so：Check whether the router is powered off or disconnected from the network. If so, the router will take some time to recover. Wait for two minutes and then check whether your device is online. Check whether the router has been replaced, or the Wi-Fi name or password has been changed. If so, remove your device and then add it to the network again. Check whether the firmware is the latest version. If your device still fails to connect to the network after the preceding steps, place your device in a network environment with strong and stable signals and connect it to the network again. If your device is still offline, provide us with your device ID. We will arrange for technical support engineers to troubleshoot this issue.