Regarding "HLR," did anyone Google it in all caps, (exactly as Q has written down?)
HLR - "The Home Location Register is a database from a mobile network in which information from all mobile subscribers is stored. The HLR contains information about the subscribers identity, his telephone number, the associated services and general information about the location of the subscriber. The exact location of the subscriber is kept in a Visitor Location Register."
Could this provide details of Hussein's whereabouts? His EXACT whereabouts being provided by the Visitor Location Register (VLR?)