CELL O MANIA

 

 

 

 

 

 

 

1. Stay connected anytime and anywhere: The most basic benefit of a cell phone for which most of us use it is that we can stay connected with our loved ones in any part of the world and anytime. Gone are the days when we used to stand in queues to make an STD or ISD calls. You can talk to your loved ones staying even seven seas far with cell phones.
2. SMS: When initially SMS was invented, the makers were not actually sure whether it will work. I mean when people can straightaway make a call and talk, then why would anybody like to take the pain of typing a message! But to their surprise SMSs are today the most widely used service across the world. There are many situations in which a person can’t attend a call, so all you have to do is simply send an SMS and without talking your message is delivered.
3. Your way out in emergencies: Imagine you are stuck in a traffic jam, getting late for a meeting or your car has broken down in middle of nowhere. Cell phones are of great use in time of such emergencies. You can contact help with the use of cell phone easily.
4. Navigation in your hand: cell phones are constantly being upgraded with new technology and the recent phones are equipped with navigation and GPRS systems. You can never get lost if you have a cell phone with navigation system. Imagine, it gives you the details of every nook and corner of your destination.
5. Mini PC: cell phones are nowadays almost equivalent to mini computers.
6. The latest ones are equipped with windows and internet facilities. So you don’t need to wait for the newspaper! You can simply access the internet on your cell phone and get to know about the latest news, your e-mails, movie shows and a lot more!
7. Enhance your business: cell phones are a great help even at your business. With cell phones, you can constantly stay in touch with your employees and get to know about crucial information of your business.
8. Help in legal matters: a lot of criminals are these days being held because of their cell phones! The police can track a criminal via tracking the place where his mobile phone is using GPS. Also checking a cell phone’s call records give vital information to the defense forces about the criminals.
9. Wholesome entertainment: with a cell phone in your hand, you don’t need a TV or PC to get entertained. It is all in your cell phone. You can play games, listen to music, and click pictures and even record videos in your cell phone.
10. Transfer of data: these days cell phones are equipped with infrared and bluetooth technologies which allow you to transfer data like mails, pictures, music and even videos just in span of seconds.
11. Prestige and fashion statement: cell phones have become a matter of prestige and fashion statement, especially among the youth. If you have a latest handset then you can definitely impress others!

 

The disadvanteges of mobile phones are:it can damage your ear, its quite expensive, sometimes the reception is poor in some areas, you cant talk underground and in planes, people use bluetooth and the camera in bad ways, people use the phone while they are driving and this can couse problems. There are some disadvantages of owning a cell phone. As mentioned earlier in this unit, cell phones are those in which information is sent to one or more receiver by means of a modulated electromagnetic wave. Electromagnetic radiation can occur as a result of electromagnetic waves. The wavelength of electromagnetic wave determines its properties X-rays, infrared microwaves, radio waves and light waves . The frequency of an electromagnetic wave is the number of cycle that occurs in one second.
There are concerns about cell phones like many other electronic devices. First, the cell phone physically has non-repairable internal parts that can corrode. For example if a cell phone gets wet, you may damage internal parts. Also, extreme heat in a car can damage the battery or the cell-phone electronics and extreme cold may cause a momentary loss of the screen display. Second, analog cell phones may have problems of cloning. Cloning means someone has stolen its ID numbers and makes long distance calls on the owner's account. Third, another disadvantage of cell phones is that it does not have the ability to provide the callers location like a land line telephone. If you do not know where you are, you can not be found, if in trouble, on a cell phone. The tower can be located, but the caller can not because cells use base stations and towers to hand off calls as the user moves from one location to another. Fourth, like all electromagnetic waves, radio waves contain vibrating, electric and magnetic fields. In free space, these electric and magnetic fields are constrained to be perpendicular to each other, and to the direction of propagation. The waves can also be polarized. For example, if the electric field vibrates only in the vertical direction, the wave is vertically polarized. This polarization will not change as the wave travels through free space. In urban areas, radio waves are usually scattered by buildings and other large objects. This type of scattering effectively creates extra polarization states in all three spatial directions at a receiving antenna.