A data communication system is so adapted that even if E-mail received by a mobile
telephone has an image file attached thereto, the image represented by the image
file can be displayed. An E-mail file is received by a mobile telephone and text
represented by text data contained in the file is displayed on the display screen
of the mobile telephone. When a received E-mail file has an image file attachment,
the portable telephone interrogates a digital still camera as to whether the camera
is capable of displaying the image contained in this image file. When the camera
is capable of displaying the image, the image file is transmitted to the camera.
The image represented by the image file is then displayed on the display screen
of the camera.
