Smart phone is one of the great inventions of human. Everyone owns at least one phone these days. The Phones were invented and officially operated in 1877. So far, many different phones have come into being: public phones, telephones, phones and smartphones. The most commonly used phone type today is a smart phone. . Smartphones have the full functionality of a normal phone, but instead of having many different buttons, smartphones have only touch screens for you to manipulate on it. Also we can use it to watch movies, listen to music, study and play games. The function of taking pictures and recording videos is also very popular with people. There are many brands that manufacture smartphones like Apple, Samsung, LG, … I use the Apple iPhone 13 promax and I love it. I have great admiration and gratitude for the creators of such great products as smartphones