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Mobile Phone

Mobile phone is a device which is designed to provide two-way communication. Signal transmission is the very basic concept for mobile phone. It uses the radio wave theories which are similar to the ordinary radios. The frequencies of mobile phones of course are stronger and higher than ordinary radios to enable clearer conversation among users. The transmission of the mobile phones allow these radio wave (signals) to interact (to receive and send) from the device to the transmission centers (towers), then to another user (no matter land line or another mobile phone). The signals of mobile phone are split into small cells (This is also why mobile phones are also known as Cell Phones earlier) geographically. These cells allow radio transmission enabling authorized signals to receive and send out among the mobile phones.



From the very first the design of the mobile phones are changing. Mobile phones are getting more qualifications day by day. The number of different models and designs are growing rapidly. Different type of manufacturers invented different designs of mobile phones year after year. There are a lot of famous manufacturers those doing great work to create newer designs of mobile phones. For example Motorola, Nokia, Sony-Ericsson, Siemens, Lg etc.


Mobile phones are developed and updated by three parts:
1G- This is the first step from where mobile phones started to grow up.   It was called the first generation mobile phone. Motorola introduced the first truly portable, hand held phone. The design of   this 1G phones was not such attractive like the present ones. The size of those mobiles was too big and the weight was also high. Those mobile phones was designed with big buttons to enter phone number, little screen which only can show the numbers, large battery on the back side and a long thin antenna at the top.  


2G- In the 1990s, 'second generation' (2G) mobile phone systems such as GSM, IS-136 ("TDMA"), iDEN and IS-95 ("CDMA") began to...