Cell phone technology was first developed in the 1980’s, but cell phones became common in the early 1990’s (Firestone 24). As time progressed so did the cell phone’s technology. Cell phones became digital in the early 1990’s; making them more affordable and small enough to comfortably carry anywhere (Firestone 24). A few years later the cell phone underwent another change. In 1996 cell phones began to change again with a new technology allowing cell phones to access the Internet (Firestone 25). These smart phones became instantly popular. By the early 2000’s smart phones were common. Users could check e-mails and browse the web with applications made for cell phones (Firestone 25).
“Cell phone signals can be broadcast over wide areas. Each broad cast area is called a cell. That is how cell phones got their names” (Firestone 23). These cell phone signals are carried out through radio frequencies. Cell phones use two radio frequencies at the same time, meaning they are duplex devices (Firestone 24). A cell phone would only be able to work like a walkie-talkie if they were not duplex devices. Since cell phones are duplex devices, they use two radio frequencies. One transmits sound and the other receives it, allowing two people to talk at the same time (Firestone 24).
Two of the main parts of a cell phone are the capacitor and the battery. A cell phone’s capacitor moves and stores electricity at a reliable rate (Cunningham 15). Without it a cell phone could not function properly. The capacitor is usually made... [continues]
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