Abstract: A method to detect spam SMS messages including unsolicited repeated SMS messages originating from or sent to one or more subscribers of one or more mobile communication networks, comprises: clustering messages in similarity clusters, wherein each similarity cluster comprises SMS messages with identical or similar content; counting an amount of SMS messages in each similarity cluster; monitoring a rate of SMS messages in each similarity cluster; and classifying SMS messages of a similarity cluster as spam when the amount of SMS messages in the similarity cluster exceeds a certain first threshold and the rate of SMS messages for the similarity cluster exceeds a certain second threshold.

Abstract: A method to detect spam SMS messages including unsolicited repeated SMS messages originating from or sent to one or more subscribers of one or more mobile communication networks, comprises: clustering messages in similarity clusters, wherein each similarity cluster comprises SMS messages with identical or similar content; counting an amount of SMS messages in each similarity cluster; monitoring a rate of SMS messages in each similarity cluster; and classifying SMS messages of a similarity cluster as spam when the amount of SMS messages in the similarity cluster exceeds a certain first threshold and the rate of SMS messages for the similarity cluster exceeds a certain second threshold.

Abstract: A method for outbound/inbound roaming market share estimation comprises estimation of distributing outbound roamers of a home mobile communication network over visited mobile communication networks in one or more geographical area. The method includes maintaining frequent roamer information for subscribers of the home mobile communication network, generating a sample set of frequent outbound roamers of the home mobile communication network, polling each mobile subscriber in the sample set with a location request, analysing replies to the location request to determine geographical areas and visited mobile communication networks therefrom, determining a relative distribution of outbound roamers of the home mobile communication network across geographical areas and/or visited mobile communication networks.