The old days, people had to write a letter to communicate each other by sending a pigeon post or messenger. Some people wanted to make it easier to communicate. Therefore, new inventions such as telegraph, radio, telephone, and a newly invented mobile phone came out. Mobile phone has become the most important thing for a person. Some of us consider that mobile device as a part of our life because it supports our needs in doing things easier. We need it to connect with job, friends, and family. Then…
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