Phone Development
At past people only do communication using letters and verbal communication. For long distance communication, people use telegraph machine. This way took much time and not effective. It will be useless if you have incidental news to report.
As time goes by many scientist has developed new system and machine to make communication much easier. In 1878, Alexander Graham Bell became the first person who was able to refine telephone machine. This device can transfer people voice using cables and electromagnetic tools. The commercial selling of telephone was begun in 1940. At that time, telephone mostly used for military business and governmental works, only elite group of society who afford to buy it. To make people more comfortable while making a call, scientists introduce wireless phone series. However, this phone has limitation, and requires a receiver near it.
Today, as time and technology grows rapidly; people can enjoy long distance communication using mobile phone. It called mobile since it is easy to keep, light, small, and practice. People can buy it in their pocket. As the power, this phone types use charger battery inside. This device also enables people to send text using SMS service (Short Text Messaging). The cost is cheaper than using cable phone connection.
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