Nowadays, Effectiveness and benefits of mobile phone technologies appeared more than expected. During the recent decade, using of mobile phone improved from telephone call tools to a remote control, transfer messages and financial transactions tools. One of the most important challenges in the m- services area is the security issue. Different papers have discussed various aspects of secured networks. But, until now a extensive ranking approach has not been presented to overcome the security issues. In this paper, first the security technologies and their applications have reviewed. Then the future trends of mobile technology in the world and current condition of mobile users in Iran have investigated. The result of literature reviews showed 13 security technologies and 6 groups of applications. In the next step, with designing a questionnaire for collecting and analyzing the opinion of experts, the importance of different security technologies within six types of mobile service have s...