The invention relates to a method of changing a balance of a subscriber belonging to a subscriber group of a telecommunication network. One or more sets of data contained within a first data tree structure can be associated with one or more sets of data contained within a second data tree structure, such that the data associated with the first data tree structure is generally utilized to process the data associated with the second data tree structure. The present invention may determine specific destinations that the user often travels to and routes that the user takes between destinations.