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Nowadays everyone owns a smartphone. They became very useful. I would like to explain how smartphones were created.
A shoulder type phone appears. It was as big as a bag and the weight was 3kg. After that, it became a small size and was called a cell phone. The weight is 900g.
It then becomes smaller. The first messaging service, skywalker is added and it allowed people to send easy messages.
After internet connection is enabled. The screen becomes color and the phone gets a camera. Some can even be used as a credit card and some can watch tv.
Then Docomo first sells a smartphone. Afterward Softbank sells the first iPhone in Japan and smartphones became very popular.

A 回答 (2件)

some can watch tv. -> some enable watching tv.

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勘違いかもですが、ところどころピリオドが抜けてる気がします。

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