The Modern World's Mobile Phone

Praise The Lord Jesus Christ Mobile phones IN THE EARLY 1990s,THE MOBILE PHONE (Cell phone) was a rare luxury, but in recent years it has outsold almost every other electrical gadget- as a professional tool, domestic convenience,and even a fashion accessory. Mobile phones have also generally shrunk in size,due to improvements in rechargeable batteries,which now store more electricity for longer in a smaller package ,and to smaller , more efficient electronics that use less electricity.A "mobile" is basically a low- power radio receiver-transmitter,plus a tiny microphone to convert sounds into electrical signals, and a small speaker that does the reverse. When the mobile phone is activated,it sends out a radio signal that is answered by near by nearby mast transmitter- receivers. The phone locks onto the clearest signal and uses this while within range ( the range of each transmitter is known as a cell). The phone continuously monitors signal strength and switches to an alternative transmitter when necessary.The phone's liquid crystal display (LCD)shows numbers, letters, symbols,and colour pictures.Newer models have a larger screen for more complex colour images,and commonly incorporate a camera,radio,and MP3 functionality. Smartphones, which are increasingly widespread, contain additional software and more may be downloaded.Smartphones typically Offer Internet and email access,PDA- like functions(see pp.568-569),and may even contain GPS navigation software.

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