Cellular phone - a great invention or a harmful device? A smartphone. It is the device that we all use. We use it when we need to make a call, send a message or find some information that we need. We can even say that smartphones became the fastest and the most productive secretaries. And yet many people claim that a mobile phone is the most harmful device nowadays. But is it true? My contention is that smartphones are the irreplaceable assistants and that we just need to learn to use them correctly. To begin with, a phone is one of the means of communication. It helps to stay in touch with people that are far away from us. There are many applications that offer voice and video calls for free. Furthermore, telephones are very compact. They easily fit in our pockets, so that we can take them everywhere we go and use whenever we need. Additionally, modern phones have lots of useful functions. They combine several devices that we use all the time: alarm, camera, flash drive, notebook and so on. However, more and more people tend to limit the time they spend using a phone. Firstly, they are convinced that smartphones make people less communicative. A common situation: friends sitting next to each other don’t talk but stare at the screens of their phones. Secondly, they believe that electromagnetic radiation cause dizziness, discomfort, nausea, and many other illnesses. And, as a result, damage our brains and bodies. I cannot agree with this opinion because I think that smartphones make a huge positive impact on human communication. In the past, we were only able to talk with a limited amount of people that surround us. But nowadays we can make new friends from all over the world and talk to them. And as for the radiation, there are no facts that prove this due to the absence of any long-term studies. To sum up, I would like to say that despite many legitimate reasons for us to be concerned about smartphones, I am convinced that these devices make our lives easier and happier.