The old days, people had to write a letter to communicate each other by sending a pigeon post or messenger. Some people wanted to make it easier to communicate. Therefore, new inventions such as telegraph, radio, telephone, and a newly invented mobile phone came out. Mobile phone has become the most important thing for a person. Some of us consider that mobile device as a part of our life because it supports our needs in doing things easier. We need it to connect with job, friends, and family. Then you can choose a smart phone which has become the best solution because it offers more advanced computing ability and connectivity rather than a contemporary phone where you can only text, play games, and call. Making different features with a smart phone always have a operating system. It is a platform that is in your device which implants programs or application in order for it to work. You can also set as many application such as games, multimedia app, eBooks, etc. but implanting the application to your smart phone is figuring out how it operates. A advantage of smart phone is for people to have a familiar grip on how it operates and the importance for your smart phone, which how to operate is the most important thing. We could use smart phones to increase our knowledge to create modification in smart phone. In addition, smart phones increased the number of game addicts. There are lots of games that we can play such as: candy crush, cut the rope, angry bird, and much more addicting games to us. People get lazy carrying around with their laptops because it's too heavy to carry whereas smart phone it is small and light which allows people to easily carry it with them to places without a hassle. For example, we can take pictures, make plans with friends, play games, and listen to music. Those who are against ideas about smart phones may say that it allows users to communicate all around the world. However, corresponding with friends online is important, but the people who are in front of you