When we put a  15.6 inches  5G  Smartphone on a Table in a  VERTICAL POSITION  and place   a    wireless/bluetooth    keyboard and a  wireless/bluetooth    mouse  in front of  it , it looks as if we are  sitting/working  in front of a 5G Cellular Tablet ,  and in that  VERTICAL POSITION ,  we can use it to make telephone calls to any  landline    telephone/number  [ 1 ] and reply telephone calls from any  landline  telephone/number    [ 1 ] and make phone calls to any 5G smartphone and reply phone calls from any 5G smartphone.