Go to Settings--(Other networks and Connections--) Smart Mirroring--click the Settings icon at the upper right corner to turn on DLNA (For some phones, go to Settings--More settings--DLNA to turn it on);Go to Settings>Smart Mirroring(Wi-Fi Display)>Screen Mirroring and turn it on; 2. Make sure the device and your phone connect to the same Wi-Fi; 3.
