How does cellular phone works?
102553
http://electronics.howstuffworks.com/cell-phone.htm
594352
I don't know. But the same thing happens to my cell phone.
283305
What is your question? I would be surprised if modern cell phones used discrete transitors. There are many transitors in a cell phone's integrated circuits however.
710189
It's definitely possible to use a cell phone as a modem and I direct you to two sources:\n\nOver the Road Wireless For Dummies (available at Amazon.com, etc.) has generic instructions for using your cell phone as a modem and, for example, the Cingular web site ( http://www.cingular.com/sbusiness/phonemodem ) also addresses the question. I imagine other cell phone providers offer similar information.  \n\nI don't know, however, if this helps you in the UK but another source of information might be the forum at EV-DO Info ( http://www.evdoinfo.com/ ).
769812
Decibels are a measure of sound waves.  The signal between a cell phone and a cell tower is a radio signal (aka electromagnetic wave).  Two cell phones don't communicate directly.   Given these facts, I don't see how your question can have any meaning.  That makes answering impossible.
304308
for people who want to get their mail on cell phone.
111940
Your cell phone company may.
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
44799
You need a big dish antenna and a lot of power to transmit to a geo satellite.  If your cell phone had that, it would be to0 big and heavy to carry.  That's why towers combine calls from many different users and route them, as needed, to other towers via wires, microwaves, or satellite communications.
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
767162
gprs is a cable that u can connect ur cell phone to it  & u can configrate it by setup gprs program then connet ur cell phone .
645840
The GSM (and all other digital mobile) phones are encrypted with a split key. The Government has one half, and the service provider has the other. The two sections of the key are required to intercept communications on the phone, and the only way to get both keys together is with a court order, ie. a warrant.
5344
Two cell phones cannot connect with one another point to point in the conventional sense as they have to communicate through the network because the numbers dialled need to be resolved by the mobile switch (i.e. the exchange) and connected to the other cell.\n\nHowever, the two cell phones can definitely connect in the point-to-point mode if both the cell phones are bluetooth/WiFi enabled. The cell phones would be behaving similar to walkie talkies in this case.
631344
you phone will ring..
871093
Money, then cell phone.
1156885
They emit RF, the higher the frequency the more harmful the RF generally speaking. cell phones are in the 900mhz-1.8ghz range which given more power would be very harmful to the soft tissues of the human body. Cell phones do not put out enough power to be harmful as required by law in the FCC type acceptance for your specific phone. The FCC has set exposure limits on all emission devices which is also why some devices or radios are limited to occupational use only, as their emissions over time could be harmful. A PCS cell phone that put out 1000watts would be the same as sticking your head in a microwave which is why they generally only put out a quarter watt. Pbmao is incorrect in his summary of only infrared freq range is dangerous. Any frequency range given enough power can be dangerous. I have had a hole burned through my hand with a 900mhz radio putting out 500 watts. Stand between two subwoofers at 10hz and 10,000 watts and see what happens to your ear drums. Everything around you even the light that you see resonates or is a resonating frequency the spectrum starts off at sounds you can not even hear, to the electricity in your walls, to the light your eyes detects to see the world around you.