The opportunities offered by the Internet have made the concept of e-commerce very crucial as it makes the whole world a globular marketplace that serves 24 hours a day. The accessibility constraints of the Internet are becoming a less important obstacle as mobile communication devices become widespread. First of all it is clear that usage of mobile devices like cellular phones are getting popular day by day. Mobile Internet services supplied by these mobile devices eliminate the need of a stationary connection point and offer a more personal content with special services given. In this paper we argue on the concept of M-commerce and the facilities presented by it. An online reservation application is developed as an example.