  Mobile phone use is an unfolding process by nature. In this study, it is
explicated as two sequential processes: mobile sessions composed of an
uninterrupted set of behaviors and mobile trajectories composed of mobile
sessions and mobile-off time. A dataset of a five-month behavioral logfile of
mobile application use by approximately 2,500 users in Hong Kong is used.
Mobile sessions are constructed and mined to uncover sequential characteristics
and patterns in mobile phone use. Mobile trajectories are analyzed to examine
intraindividual change and interindividual differences on mobile re-engagement
as indicators of behavioral dynamics in mobile phone use. The study provides
empirical support for and expands the boundaries of existing theories about
combinatorial use of information and communication technologies (ICTs).
Finally, the understanding on mobile temporality is enhanced, that is, mobile
temporality is homogeneous across social sectors. Furthermore, mobile phones
redefine, rather than blur, the boundary between private and public time.
