How do cellphones work according to physics?

Question

anonymous · Answer

it has to do with electronics to be more specific..its all about how we can modify a electromagnetic wave according to the sound of speaker at one end and undo this modification at reciver's end to get the sound of speaker.that's the bottom line...
for more details refer wikipedia..

anonymous · Answer

Cell phones are defined as sophisticated radios. They are a type of wireless communication device that uses many small cells with a base station and a cell phone tower at the center of each cell. These cells have extensive frequencies that allow thousands of people to use cell phones at the same time. In this process, cellular calls are transferred from base station to base station as a user travels from cell to cell. For example, if you were traveling from New Haven to Rhode Island, your call would be transferred from several based stations along the way. Cellular phones use a short-wave analog or digital telecommunication in which a subscriber has a wireless connection from a mobile telephone to a relatively nearby transmitter and receiver in the base station.