If a Linux Smartphone have a 15.6 inches screen size , I believe , there is no need to connect the Linux Smartphone to an external monitor or a Desktop Monitor because a Linux Smartphone with 15.6 inches screen size is already huge , unless we want to connect the Linux Smartphone to a larger display with a much bigger screen , 19 inches , 27 inches , 32 inches , 40 inches , 50 inches , 65 inches , or more .

          If  a   Linux  Smartphone
           have a  15.6 inches  screen size , I believe , there is
           no need to connect the  Linux  Smartphone  to an

           external monitor or a Desktop Monitor  because
           a   Linux Smartphone  with  15.6 inches  screen size is
           already huge ,  unless we want to connect the Linux
           Smartphone to a larger display with a  much
           bigger screen , 19 inches , 27 inches , 32 inches , 40 inches , 50
           inches , 65 inches , or more .

The picture above is for illustrative purposes only to describe a situation whereby if the  Linux Smartphone is  15.6 inches , it is not neccessary to connect the Linux smartphone to an external monitor or a  Desktop Monitor because a Linux Smartphone with  15.6 inches screen size  is already huge , unless  we want to connect the Linux Smartphone to  a larger display with a much bigger screen , 19 inches , 27 inches , 32 inches , 40 inches ,  50 inches , 65 inches , or more .