Freq from 850-1900 for sure in Cell Phones.... Hope it helps?
I think it is in the infrared light category
No actually its somewhere in between radio waves and microwaves ;)
cellular phones typically use 800 and 900 Mhz signals. PCS phones use 1800-1900 Mhz
common frequency in North America are 850 and 1900 MHz
Cell phones use radio waves travelling at the speed of light with a typical frequency of 800 MHz, which is ten times greater than FM radio frequency. Due to shorter wavelengths, the cell phones use very short antennas.
Rugged cell phones are cell phones that are durable and can withstand accidents such as being dropped and handled roughly better than most normal cell phones can.
because cell phones have a chemical frequency in them that causes energy waves that could some day lead into a long term effect or possibly cancer.
Orthogonal Frequency Division Multiple Access. It has something to do with the way cell phones transmit signals.
The average American changes cell phones once every 2 years. The average American (and most Americans) gets their cell phone free with a 1-2 year contract with a cell phone company.
Do you mean 'When were the first cell phones sold?' If so, the answer is in the mid 1980s.
Pay Phones
They are used for stuff.
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cell phones are mainly used for communicating such as txting, calling and etc...and for entertainment as well and also for emergencies