Cell phones
cell phone is a electronic devie.it is invented by doctor martin cooper .he made a first cellular call in april of 1973.now a days everyone using the cell phones.we cant't see a person without mobiles.it is invented in 21st century.cell phone has more advantages and also disadvantages.
features of cell phones:
1)phone calling: you can talk to anyone using mobile.
2)messaging:you can send and receive the text messages.
3)email:you cand send and receive the emails.
4)voice mail:you can send voice mail .
5)games:you can play games on your mobile.
6)play music:you can listen music on mp3 player using mobile.
7)images:you can take photos on your mobile.
8)videos:you can take a videos on your mobile.
9)gprs:you can access a internet using gprs connection.
10)alarm clock:you can alarm clock on your mobile.
11)movies:you can see movies on our mobile.
advantages of the cell phones:
1)you can use in emergencies.
2)you can contact your friends using mobile.
3)you can listen mp3 music to it.
4)you can listen fm radio to it.
5)you can take photos and videos and you can share with your friends.
6)you can use it as a torch light.
7)you can use it as a alarm clock
8)you can check time in other countries.
9)you use it as a convertor.
10)you can use it as a convertor.
11)you can play games .and you can download games on your mobile.
12)you can use a calcultor.
13)you can send and receive via bluetooth.
disadvantage of cell phones:
1)it is effect on human health.
2)cell phone elominate loe level of rf(radio frequency)radiation.the radiation affects the health.
3)cell phone vibration affects yout ear drum.
4)cell phone ringing affect your heart if you put your in your upper pocket.
5)cell phone uses microwave radiations to transmit data.the microwave lead to serious health problems like brain tumors,ear defects,headaches,sleeping problems,and blurring of vision.these microwave cause the demage to the dna.
6)cell phone use is expensive.they charge more money for text messages,downloading and while roaming.
7)mobile has a signal problems in some places.
8)people use bluetooth and camera in bad ways.
9)mobile phone advertisements through message are becomming a pain to mobile users.
10)cell cannot have the information if any new person call to your mobile.
11)cell phone and driving:accidents occurs if talking on phone while driving.
12)disturbing elements:cell phone making problems in places whereever need silents such places are hospital,libraries,movie theaters,meeting.
13)cheating on exams:some of the students cheating on exams using cell phones.
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