The increasing important role of smart phones in our life is a phenomenon. Smart phones handle more and more tasks like web-browsing, e-mailing and human entertainment. The people are addicted to their user. The popularity of them drives the attackers to implement advanced attack techniques against them. One of the best techniques to prevent some these advanced attack techniques is to ensure the security of mobile network. The communication in a mobile network does between mobile station and network. During of it, both components exchange important security data. In order to ensure and research the security of a mobile network, we designed and implemented an information system that monitors a mobile network. The information system is consists of an application that is running in a smart phone , named SIM Monitor, and an application that is running in a server, named SIM Analyzer. The purpose of SIM Monitor is to record security characteristics from network and SIM or USIM card of subscriber and the purpose of SIM Analyzer is to aggregate the above data and extract some important security information for network of subscriber. The extracted results provide the researcher to monitor the security characteristics of mobile network and find possible weak points of it.