  Users need to configure default apps when they first start using their
devices. The privacy configurations of the default apps do not always match
what users think they have initially enabled. We first systematically evaluated
the privacy configurations of default apps. We discovered serious issues with
the documentation of the default apps. Based on these findings, we explored
users' experiences with an interview study (N=15). Our findings from both
studies show that: the instructions of setting privacy configurations of
default apps are vague and lack required steps; users were unable to disable
default apps from accessing their personal information; users assumed they were
being tracked by some default apps; default apps may cause tensions in family
relationships because of information sharing. Our results illuminate on the
privacy and security implications of configuring the privacy of default apps
and how users perceive and understand the mobile ecosystem.
