• Only Android phones are supported. 
• Update Android system and related applications to the latest version. 
• Disconnect any VPN on the mobile phone if applicable. 
• Ensure Wi-Fi and Bluetooth functions on mobile phone are working. 
• Restart the Android phone and reconnect. 
• Restore screen's Factory Settings by going to home screen: Setting>Basic Setup> Restore Factory Setting.

Reset the unit to factory mode and try again. 

Please note that resetting your device to factory settings removes all current data.