First commercially available handheld cellular mobile phone, 1984. The first handheld cellular mobile phone was demonstrated by john. Mitchell 1 2 and Martin cooper of Motorola in paperless 1973, using a handset weighing 2 kilograms (4.4 lb). 3 The first commercial automated cellular network was launched in Japan by nippon Telegraph and Telephone in 1979. This was followed in 1981 by the simultaneous launch of the nordic Mobile telephone (NMT) system in Denmark, finland, norway, and Sweden. 8 several other countries then followed in the early to mid-1980s. These first-generation ( 1G ) systems could support far more simultaneous calls but still used analog cellular technology. In 1983, the dynatac 8000x was the first commercially available handheld mobile phone.
7 Contents History main article: History of mobile phones Martin cooper of Motorola made the first publicized handheld mobile phone call on a prototype dynatac model on April 4, 1973. This is a reenactment in 2007. A handheld mobile radio telephone service was envisioned in the early stages of radio engineering. In 1917, finnish inventor Eric Tigerstedt filed a patent for a "pocket-size folding telephone with a very thin carbon microphone". Early predecessors of cellular phones included analog radio communications from ships and trains. The race to create truly portable telephone devices began after World War ii, with developments taking place in many countries. The advances in mobile telephony have been traced in successive "generations starting with the early zeroth-generation ( 0G ) services, such as Bell System 's Mobile telephone service and its successor, the Improved Mobile telephone service. These 0G systems were not cellular, supported few simultaneous calls, and were very expensive. The motorola dynatac 8000X.
For And Against Essay about Mobile Phones
A mobile phone, known as a cell phone in North America, is a portable telephone that can make and the receive calls over a radio frequency link while the user is moving within a telephone service area. The radio frequency link establishes a connection to the switching systems of a mobile phone operator, which provides access to the public switched telephone network (pstn). Modern mobile telephone services use a cellular network architecture, and, therefore, mobile telephones are called cellular telephones or cell phones, in North America. In addition to telephony, 2000s-era mobile phones support a variety of other services, such as text messaging, mms, email, internet access, short-range wireless communications ( infrared, bluetooth business applications, video games, and digital photography. Mobile phones offering only those capabilities are known as feature phones ; mobile phones which offer greatly advanced computing capabilities are referred to as smartphones. The first handheld mobile phone was demonstrated by john.
Mitchell 1 2 and Martin cooper of Motorola in 1973, using a handset weighing. 2 kilograms (4.4 lbs). 3 In 1979, nippon Telegraph and Telephone (NTT) launched the world's first cellular network in Japan. 4 In 1983, the dynatac 8000x was the first commercially available handheld mobile phone. From 1983 to 2014, worldwide mobile phone subscriptions grew to over seven billion, penetrating virtually 100 of the global population and reaching even the bottom of the economic pyramid. 5 In first quarter of 2016, the top smartphone developers worldwide were samsung, apple, and huawei (and "smartphone sales represented 78 percent of total mobile phone sales. 6 For feature phones (or "dumbphones as of 2016, the largest were samsung, nokia, and Alcatel.
We can access all the world's information no matter where we are, just by using a device small enough to fit into one hand. But be careful - mobile phones might also be bad for you! P/s: Plz help me to correct this essay since next week i'm going to do final exam. How can i reduce this essay because i should write from 150 to 180 words and this essay has about 291 words. Thank you for helping.
I ran this through a word doc to get a word count. This comes in at 190 words. Because of their convenience, mobile phones have become universally popular. Excessive use of mobile phones has been accused of causing dizziness, and "radiations emitted from the phone are dead harmful for the eardrum says ( person's name and title. ) And drivers distracted by talking on their cell phones are more likely to get into car crashes. "Cell phone" redirects here. For the film, see. For the mobile personal computer, see. Evolution of mobile phones, to an early smartphone.
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Moreover, radiations emitted from the phone are dead harmful for the eardrum, has proved by many scientist. it has not been proved by many scientists. And "radiations emitted from the phone are dead harmful for the eardrum tree says ( person's name and wood title. ) (note: Attach this after the word "dizziness" in the sentence above). It is essential not good for you and others. Owning a mobile phone in your hand is you can solve many issues and hold most of information around the world. Even though is not good for your health and you have to protect yourself from bad effects of mobile phones if you choose to have one. this little summary is disorganized and poorly thought out. Mobile phones solve problems and provide new channels of communication.
If you use mobile phones too much, you will page get bad effects like dizzy, blood-brain barrier, or ears problems. blood-brain barrier is not a harmful effect. It is a part of the body. Excessive use of mobile phones has been accused of causing dizziness, (note: Connect this sentence with the one after the next). In addition, when you use mobile phones while you are driving, you will get an accident. get in an accident (note: move this part to after the next one). And drivers distracted by talking on their cell phones are more likely to get into car crashes.
for listening to music, playing games, surfing the net, and text messaging. It's hard to picture life as it was before the mobile phone. On the other hand, there are also disadvantages. don't say both "on the other hand" and "also". But there are disadvantages to the use of mobile phones. Using a lot mobile phone can harm your brain, particularly teenager and children who are under 16 years old. using mobile phones a lot can harm your brain spell out the number 16 as a word. Using mobile phones is said to be harmful to the brain, especially for those who are under the age of sixteen.
For instance, you can contact easily to your friends by calling or sending messages everywhere without electricity. It is maybe the main reason why almost all people today choose to own a mobile phone. reduce the word count by deleting the repetition of the same idea. you have used all these words to point out that mobile phones are mobile. With them we can call anyone at any time, independent of a landline connection. From the customers point of view, it is obvious that mobile phones assist you in business a lot, essays such as, make schedule of working, surf the internet, and keep in touch with their companies. "assist you in business a lot, such. " should be "assist you in business. " don't shift from "we" to "you" "make schedule of working" does not really carry a meaning surfing the internet belongs in the next sentence.
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Mobile Phones - a great invention? Mobile Phones - a flawed Invention? Mobile phone is a good technology which is not lacking from our lives. This report will discuss the advantages and disadvantages of using mobile phones. We are trimming words already. Today, mobile phone has become popular to everybody since it is very convenient. phoneS have popular for everybody since they are delete "very because of their convenience, mobile phones have become universally popular. The most advantage of having a mobile phone is you can communicate to your family oliver and your friends no matter what where you are.