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(57) ABSTRACT A method for identifying an application installed in a user device of a communication system is disclosed. Based on user device and network resources utilized by the user device and installation information about applications installed applica tion, an identification of an application can be performed. An advantage with embodiments of this invention is that an appli cation can be identified, without prior information how the application affects user device and network resources. Mali cious and noxious applications can thereby be identified. Also, a resource consumption reporting service offered to the subscribers by the operator is enabled.