Abstract: In a telecommunications network including a plurality of mobile terminals, a method of analysing missed call events in relation to at least one of the plurality of mobile terminals, the method including: determining the occurrence of a missed call event; recording the missed call event in a database, including an identity relating to the called terminal; determining and allocating a status of the called mobile terminal to the missed call event, the status selected from a plurality of options, with at least one option relating to an unreachable terminal situation; and analysing the missed call event data relating to unreachable situations to identify the existence of any patterns relating to a particular called terminal/user, called terminal type, location and/or time period. The method may also be embodied in a network element, such as a Call Alert Application Server.