Nowadays, the use of mobile data is becoming more and more difficult because there are many people who own a smartphone, and thus the signal is fragmented. Therefore, in quite urgent situations, if we need Internet access, there is a possibility that we cannot access it because there are many devices already connected. A service that would benefit from a new solution that does not require Internet access is the taxi service. In situations such as leaving from a concert or visiting a foreign country, a taxi application over the peer-to-peer mobile networks would be a very good idea in meeting the mobility needs. To develop such an application, we need to understand the concept of opportunistic networks and other features that come with them such as routing, trusting mechanisms, etc. This paper presents a possible solution of a peer-to-peer mobile taxi application, the motivation behind the implementation of such an application, as well as all the technical details needed to understand and develop the concept. Finally, we also turn our attention to some potential legal implications of the proposed solution.