A mobile phone is a device which behaves as a normal telephone wrist being able to move over a wide area(cf. cord- less phone which acts as a telephone only within a limited range).
Mobile phones allow connections to be made to the telephone network, nor- mally by directly dialing the other party's number on a built in keypad. Most cur rent mobile phones use a combination of radio wave transmission and conventional telephone circuit switching, though packet switching is already in use for some parts of the mobile phone network, especially for services such as Internet access and WAP.