| Mobile phones are wireless electronic device used for | | | | Generally, mobile phones obtain power supply from |
| communication purposes over a network of | | | | batteries that can be recharged from portable |
| specialized stations known as cell sites. These sites | | | | batteries, USB port, and cigarette lighter socket in a |
| are microwave antennas fixed in place of populated | | | | car using an adapter or from solar panel or a dynamo. |
| areas. It is connected to a cabled cellular network | | | | There are three kinds of most common used mobile |
| relatively low-power radio transmitters which | | | | phone batteries such as nickel metal-hydride as they |
| broadcast the presence and relay communications | | | | are low in weight and size. Lithium-ion as they are |
| between mobile handsets and the switch. Mobile | | | | lighter and do not have voltage depression and |
| phones has a transmitter and receiver combined in | | | | lithium-polymer batteries as they are lower weight |
| single housing that transmits voice and data to cell | | | | and make the battery a shape other than strict |
| sites, approximately not more than 800 to 1300 | | | | rectangular prism. |
| meters away. | | | | In addition to the battery, All GSM mobile phones |
| Several mobile phones may support many functional | | | | require a small microchip called a SIM card Or |
| services like sending SMS (Short Message Service) | | | | Subscriber Identity Module, to function. It is placed |
| for text messaging, MMS (Multimedia Messaging | | | | underneath the battery of a mobile phone in the rear |
| Service) for sending and receiving photos and videos, | | | | unit approximately the size of a postage stamp and |
| access to internet services such as WAP and i-Mode, | | | | when properly activated the phone configures the |
| emails, downloading videos and games, Bluetooth | | | | data and information about the mobile phone. Other |
| connectivity, infrared, camera with video recorder, | | | | mobile phones do not use a SIM Card can be |
| radio connection, music (MP3), other mobile phones | | | | activated by using a special digit to access the NAM |
| offers advance services called the Third generation | | | | or Name or programming menu. |
| (3G) or video telephony/calling. | | | | |