Hi, i have a tab s4 and french langage so maybe you won't understand...You have to go in Parameters/Samsung DEX...you have to enable the function Automatic Start when HDMI is connected..this is the third line for me...Check this ...it is supposed to work automatically if you are in DEX mode. It works for me and I don't bought a Samsung cable...You don't have to pass via a dock, you just need to plug a cable USB-C to HDMI like this one (except if plugs are different in your country)
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