Q. What are 800 MHz and 1.5 GHz?

A. They are the frequencies of radio wave transmissions of cellular phones. Frequency is the number of signal vibrations in one second and Hz is its unit of measure. A frequency of 1 Hz vibrates once per second and a frequency of 1 MHz vibrates 1 million times per second. One GHz is a frequency that vibrates 1 billion times per second.