There are some consumers , there are some people or senior

citizens ,

      when they see a  Smartphone with a screen size of

      15.6 inches  or  a.  folding Smartphone which can

      unfold to a   15.6 inches screen size to  become a 

      15.6 inches  Tablet , they love it so much .    The main

      reason I believe is  that for people or consumers

      or  senior  citizens  who want only one

      computing device , 15.6-inches screen size hits the sweet

      spot.  It's the minimum screen size to achieve

      the kind of usability , required in

      having only one device , required in having only

    one computer ,  required in having only one machine

     which they can use as a Laptop, which they can use as a

     Tablet and above all which they can use as a Smartphone.

      And that one machine ,  and that one

      computing device could be  a   Smartphone  or  a  5G 

        Smartphone with a screen size of

      15.6 inches  or  a  5G folding Smartphone (A

      5G folding smartphone that can unfold into a

      Tablet to become a  15.6 inches 5G Tablet  .  A     " 5G

      folding smartphone that can unfold into a

      Tablet to become a  15.6 inches 5G Tablet "   is  a  good

      value  proposition because we can use our 5G folding

      smartphone as a  Laptop , as a Tablet and  above all as a

      Smartphone) or it could be a  5G  Cellular Laptop

    ( a  360 degrees foldable   15.6 inches 5G  Laptop  that can unfold into a

        15.6 inches Tablet  or    a   detachable   15.6 inches  5G  Laptop that

      can detach to become a  15.6 inches  Tablet ) , or it could

      be a  5G  Cellular  Tablet ( a  5G Tablet which have a  15.6

      inches screen size ).

         

      With a 15.6 inches screen size or a 15.6

inches form factor ,

the onscreen keyboard , on a 15.6 inches Smartphone or on a 5G Folding Smartphone

     (a Folding Smartphone which can unfold into a  15.6 inches Tablet) or

  on a  5G Laptop ( " 360 degrees

foldable/detachable" 15.6 inches 5G Laptop that can

             transform/unfold/detach into a 15.6 inches

Tablet ) should be quite big ( just like the onscreen

keyboard for a Windows 10 tablet ) so that typing ( sms ,

emails , WhatsApp messages , WeChat messages , Snapchat

messages , Facebook , Instagram , etc., etc. ) and

tapping on a large 15.6 inches onscreen

       keyboard is a much more accurate

experience .

        When a  Smartphone has a screen size of

         15.6 inches or when a folding Smartphone

          can unfold into a 15.6 inches

         Tablet , there is no need to connect them to :

1. external portable screen monitor  in order to increase the screen of a Smartphone or a Folding Smartphone to  15.6 inches like this or  this or this or this or this or this  OR  to turn a Smartphone or a Folding Smartphone into a  15.6 inches Tablet like this or  this or this or this or this  OR  to turn a Smartphone or a Folding Smartphone into a full-blown Desktop like this or this or this or this or this or this  because the 15.6 inches form factor in a 15.6 inches Smartphone and the  15.6 inches form factor when  " a Folding Smartphone is unfold into a  15.6 inches Tablet " , is already huge . Unless we want the 15.6 inches Smartphone or the Folding Smartphone(  a folding Smartphone that can unfold into a 15.6 inches  Tablet )  to  connect  to a larger display or a much bigger monitor screen size  e.g. 17 inches ,  22 inches , 27 inches , 32