1. Is there any obstacle between the smart device and the mobile phone? The human body

or metal jewellery can interfere with the stability of the Bluetooth connection.

2. Please check if the device is fully charged.

3. For iPhone, try to ignore the device in the Bluetooth settings. Setting path: System

Settings Bluetooth-Tap the icon on the right or Ignore this device.

4. if your iPhone is bound with too many Bluetooth devices, please ignore a few devices in the system Bluetooth settings.

Note: If the problem can't be resolved through

the above troubleshooting steps, it is recommended to restart Bluetooth or your mobile phone.