My favorite thing I often have in my pocket

There are some things I often have in my pocket. One of my favorite thing I have is iPhone. It is very useful. I couldn't have imagined a few years ago that I have it now. It has a variety of functions that it originally has. In addition, iPhone users can add more functions by downloading applications from App store. Many of the applications offered are free. If people want to study English, they can study with iPhone. In the case of improving listening skill, people can download music files on iTunes, some of which are free. They can also get files to improve listening skill by just utilizing internet. Because iPhone is a kind of smartphone, it allows people to view websites for personal computer users. People can get a lot of files and scripts of the files for free on the websites. I want to know how to use iPhone more.

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