| Symptom | Possible cause | Solution | 
| The phone projection function is not performed when a smartphone is connected using a USB cable. | Phone projection is not supported. | Visit the website to check whether your smartphone supports the phone projection. | 
| The function is inactive. | On the Home screen, navigate to Settings ► Phone connections and activate the connection function from the Phone projection settings menu.Make sure that the phone projection is not disabled in the App settings or and not blocked-out settings on your smartphone.
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 | Smartphone encounters poor operation or malfunction. | Check that the smartphone battery level is not too low. Recognition may not work properly when the battery level is too low.The phone projection may not work properly when the signal strength is weak.If the smartphone is locked, first unlock it.Initialise the smartphone and connect the device again.
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| A black screen appears when the phone projection is activated or in use. | The smartphone malfunctions. | Remove the USB cable from the smartphone and connect the device again.Initialise the smartphone and connect the device again.
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| Wireless phone projection connection continues to fail. | A problem with the system or smartphone | On the Home screen, navigate to Settings ► Phone connections, and use the Phone projection menu to delete all connected devices.From the Android smartphone or iPhone, delete all connected devices and then connect again. ► See "Resolving a phone projection connection error."
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