how do cell phones work?
485501
There are various towers placed to receive the signal from the phone and pass it into a "land line." These towers are placed to divide a city into various "cells" that are served by each tower, and as you move your phone looks for and communicates with the nearest tower.
1087913
hi,nice idea but it posible in india?if u give idea to U.S people they tried these..things.in india u said cell phone what ever tools that govment need it may corrupt.they buy Rs 10 item to 1000.if ur implemented these the system will work  only two days becouse after these mechinary not working properly due to worest of meterial. these system are sutable for rich countries..we have 110 crores of population  data crash  in data bank.\n\nend the correption ?change people mind set not system
924138
The average cellphone puts out around 1 to 3 watts of UHF frequencies near the microwave band. Yes, it cooks your brain cells if the antenna is next to your head. It just does it very slowly. Figure it out, if you want. A microwave oven will destroy an egg in a couple of minutes using around 800 watts. Figure your cellphone puts out a quarter of a percent of that power and you might destroy enough cells in your brain the size of an egg in about 24 hours. Most folks have plenty of extra brain cells and don't notice this. Those who use their cellphone a lot will find out in time that this is not a myth.
145631
The 'How Stuff Works' website has a really good explanation.  You can find it at http://home.howstuffworks.com/question420.htm
396301
They just make phones as far as I know.
27931
Satellite Telecom.  Companies have invested a lot of money in developing the infrastructure.  By the time they have it set up the sat phones will be comparable to regular Cell phones.
52899
For exemple when u put your cell phone between ur legs, \nwhenever the cell phone rings it transmit electromagnetic fields into ur genitals, they can damage the dna chains inside ur reproductive cells (spermatozoid)
507878
Most cell phones have an E-mail address that you can correspond with. Send a message from the cell phone to your E-mail address and then you'll know the address of the cell phone. Add that address to your address book and then you can E-mail the phone any time you want.
931560
I would say mobile phones.
238718
An amazing circuit board containing the brains of the phone \nAn antenna \nA liquid crystal display  \nA keyboard \nA microphone \nA speaker \nA battery \n\nSignificance when we study it?\n\n\nThe analog-to-digital and digital-to-analog conversion chips translate the outgoing audio signal from analog to digital and the incoming signal from digital back to analog. You can learn more about A-to-D and D-to-A conversion and its importance to digital audio in How Compact Discs Work. The digital signal processor (DSP) is a highly customized processor designed to perform signal-manipulation calculations at high speed. \n\nThe microprocessor handles all of the housekeeping chores for the keyboard and display, deals with command and control signaling with the base station and also coordinates the rest of the functions on the board.   \n\n\nThe ROM and Flash memory chips provide storage for the phone's operating system and customizable features, such as the phone directory. The radio frequency (RF) and power section handles power management and recharging, and also deals with the hundreds of FM channels. Finally, the RF amplifiers handle signals traveling to and from the antenna. \n\nThe display has grown considerably in size as the number of features in cell phones have increased. Most current phones offer built-in phone directories, calculators and games. And many of the phones incorporate some type of PDA or Web browser.     \n\nSome phones store certain information, such as the SID and MIN codes, in internal Flash memory, while others use external cards that are similar to SmartMedia cards. \n  \nCell phones have such tiny speakers and microphones that it is incredible how well most of them reproduce sound. The speaker is about the size of a dime and the microphone is no larger than the watch battery beside it. Speaking of the watch battery, this is used by the cell phone's internal clock chip
79854
YOU HAVE TO BE WITHIN A CERTAIN RANGE OF A CELL TOWER. IF YOU ARE TOO MANY MILES AWAY, YOU WILL NOT HAVE A SIGNAL.  MANY PEOPLE THAT LIVE OUT IN THE COUNTRY CAN'T EVEN USE CELL PHONES/
1110004
It's called a "data cable". Go to Google -- er, I mean, Yahoo Search -- and type in "data cable" and the name of your cell phone model.\n\nI.e., "data cable Nokia 7700"\n\nAnd watch in amazement as 400000 people try to sell you the appropriate data cable.\n\nAlso suggested reading:\nhttp://mobileoffice.about.com/od/usingyourphone/a/cellmodem.htm
1062967
definitely a cellphone because now days you can get mp3 cell phones that have games on them as well and you can also keep in touch with your friends and swap music using the bluetooth features in most new phones
479174
it depends on ur cell phone as well as ur service provider. All service providers have internet access its only that ur cell must be compatible for internet. try searching ur manual or ask ur service provider they will give u all the information u want.
629594
They make a special cable for that, along with some software.  Your phone manufacturer should be able to sell it to you. \n\nJust be ready to shell out the big bucks for $5 worth of crap.
303512
Literally in the ocean is doubtful but out at sea, satellite phones work quite well. They can get expensive but allow you to make calls from the middle of nowhere!
1029353
As others have answered, it's because the signal is passed from one "cell", or transmitting tower to another as you move.\n\nUp until the mid or late 80's, there were still mobile phones which were not cell phones.  These were basically just specialized radios, and had limited range.  They were expensive and limited to people like doctors and the wealthy.  I'm not sure when they finally phased them out, or even if they are still available somewhere, but as cell phones became more & more common, and the coverage got better, there was just no need for the old style mobile phones, and the two terms became synonymous.