The social network built on top of mobile phone data has drawn increasing attention in
recent years, due to its being far more accurate than its online counterpart in mirroring
people's offline sociality. In this paper, we leverage a large dataset of mobile Call Detail
Records (CDRs), provided by one of the primary Italian operators, to build the multiplex
social network given by call and text message activities of the operator's subscribers. By
discussing the multiplex network characteristics–ranging from ego-networks, dyads and …