The smartphone is one of the greatest inventions of man. If connected to the internet, it's almost like a miniature laptop. It can even replace many other gadgets and tools. On it they can read newspapers, surf the web, send documents by gmail without using a computer. And the special thing here is that smartphones have new functions that some computers may not have. Users can completely perform multi-tasking tasks, its useful multimedia. Users can back up (backup) their data on the computer, can disable the network at any time. However, as you probably know, almost everyone wants to buy themselves a smartphone. But did you know that, in addition to adults using it, even students are given a smartphone by their parents. But they do not know that smartphones and students have harmful effects.

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