Cell Phones

Cell phones are mobile communication devices that have grown in popularity as technology has advanced. As usage of cell phones has increased globally, so has concern over their potential harm to environmental health and to human health. Future trends in research for cell phone manufacturing and usage are starting to address the issues of impending harm. Current mobile telephonic communication evolved from radio transmission dated from the 1920s to two-way radios and walkie-talkies, to mobile telephone systems (MTA and MTB), to analogue and digital. During the 1980s and 1990s, rapid changes in cellular communication included physical characteristics of cell phones, functionality of cell phones, and radio/cellular network communication. Decades of cellular technology are referred to as first generation, second generation, third generation, and fourth generation ...