Being an IC based device Cellphone is an illustrative example of the Moore's law i.e. each two years it's IC components doubles computational power (or becomes two times smaller) the beginning of XXI century a handset had just started to pretend to have some multimedia functions. Within next several years by integration audio and photo functions with main functionary (calendar, making phone calls) smart phones became a real alternative to classical media devices. Nowadays all smart phones are equipped with audio and video players, high resolution photo-video cameras, FM radio, able to communicate both via cellular link and via low-range interfaces (Bluetooth, WLAN 802.11b). Of course it has led to increasing the power consumption. For instance all this improvements has made available for users various on-line services that have a need for a large amount of data to be exchanged.
Now let us see The Evolution of Cell Phone:
