1. Device Settings: Check whether the functions of "Intelligent Notification" and "Connect Phone and Network" are enabled in the settings of your Jiaming device. If these functions are turned off, the device may not be able to keep connected.
2. Mobile phone system configuration: Please ensure that the wireless communication functions such as Bluetooth and Wi-Fi of the mobile phone are turned on and can communicate with devices.
3. Firmware update of Jiaming device: Maybe your device needs to update its firmware to ensure its compatibility with connect application.
4. Connection application problem: If you have checked the device settings and mobile phone system configuration, and the device problem has been eliminated, there may be a problem with the connection application. You can try reinstalling the application or updating to the latest version.