Date Added: Oct 2012
The use of mobile phone is increasing enormously, and hence has become a subject of recent interest and study, due to use of ElectroMagnetic (EM) wave in the microwave range and produces radiation. Various physiological studies have found that the excessive Radio Frequency (RF) wave exposure affects the biological systems negatively and depends on source's characteristics as modulation (continuous wave or pulsed), electric and magnetic-field strengths, power density, frequency, and duration of exposure in near or far zone. The fact that this radiation is unseeable, nonphysical, and passes through users bodies without users cognition makes it even more restraining. Global System for Mobile Communications (GSM) and Code Division Multiple Access (CDMA) are the two most common cellular communication technologies.