Mobile Phone

                                         

                                                                      Mobile has an History and some Advantages & Disadvantages there are many features in mobile phone.,  Today we gone talk about it there is lot things to share about it, but we gone share just hint of mobile phone. First we gone known about History of mobile.    

                             The transmission of speech by radio has a long and varied history going back to Reginald Fessenden’s invention and shore-to-ship demonstration of radio telephony.The development of mobile telephony began in 1918 with tests of wireless telephony on military trains between Berlin and Zossen.In 1926 the artist Karl Arnold created a visionary cartoon about the use of mobile phones in the street, in the picture “wireless telephony”, published in the German satirical magazine Simplicissimus .

                                     The Second World War made military use of radio telephony links. Early devices were bulky and consumed high power and the network supported only a few simultaneous conversations., In modern cellular networks allow automatic and pervasive use of mobile phones for voice and data communications.The advances in mobile telephony can be traced in successive generations from the early “0G” services like MTS and its successor Improved Mobile Telephone Service.,

                                     The First mobile Motorola was the first company to produce a handheld mobile phone. On 3 April 1973 Martin Cooper, a Motorola engineer and executive, made the first mobile telephone call from handheld subscriber equipment in front of reporters, placing a call to Dr. Joel S. Engel of Bell Labs,it has an weighed 1.1 kg and measured 23 cm long, 13 cm deep and 4.45 cm wide. The prototype offered a talk time of just 30 minutes and took 10 hours to re-charge
Later there was Radio Common Carrier or RCC was a service introduced in the 1960s by independent telephone companies to compete against AT&T’s IMTS. RCC systems used paired UHF 454/459 MHz and VHF 152/158 MHz frequencies near those used by IMTS. RCC based services were provided until the 1980s when cellular AMPS systems made RCC equipment obsolete.

 

   A mobile of radio telephone :-

                                 At this stage, the technology to implement these ideas did not exist, nor had the frequencies been allocated.In all these early examples, a mobile phone had to stay within the coverage area serviced by one base station throughout the phone call, i.e. there was no continuity of service as the phones moved through several cell areas. The concepts of frequency reuse and handoff, as well as a number of other concepts that formed the basis of modern cell phone technology.

                          At this stage, the technology to implement these ideas did not exist, nor had the frequencies been allocated.In all these early examples, a mobile phone had to stay within the coverage area serviced by one base station throughout the phone call, i.e. there was no continuity of service as the phones moved through several cell areas. The concepts of frequency reuse and handoff, as well as a number of other concepts that formed the basis of modern cell phone technology.

                          Later the growth and development as become as the use of 2G phones became more widespread and people began to utilize mobile phones in their daily lives, it became clear that demand for data (such as access to browse the internet) was growing. Furthermore, experience from fixed broadband services showed there would also be an ever increasing demand for greater data speeds. The 2G technology was nowhere near up to the job, so the industry began to work on the next generation of technology known as 3G.

Then 3G phones came better than previous one after that 4G etc..,

Advantages :-

People can communicate where ever in the world core
Day by day the advantages are improved and knwolagde come to known
Banking , train ticket ,air ticket , and futures come through mobiles
Like Entertainment songs, videos, music,browsing , software etc ..,
upcoming generation there will be exciting will be there its dam sure

Disadvantages:-

Human can’t able have continuous radiation
Vibrate or radiation will make an body problems like heart , sperm problems etc.,
Many accident occur becz of mobile….

lasts mobiles at present :- ( image )

 

                     

   

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