Each mobile has an operating system. Many people are talking about which of them is the greatest. However, nothing else but applications could help in choosing the phone. For a lot of persons this is the basis of the device. The first option is phone software called Android. It leading mainly in phones invented by HTC or Samsung. It is characterized by a large number of free apps. Android development was made possible mainly through mobile customers. They can create their own apps and sell them on the network.