Table 1.

Details on smartphone log data.

Category	Record content
App activity log	App creation/resume/launch/stop/exit
App package log	App package uninstallation/installation/replacement/change/data cleanup/restart
Call log	Number, contact name, and direction of call
Camera log	Use of camera button
Contact log	Contacts addition/deletion
Date change log	Change system date and time
GPS log	User’s locale, altitude, latitude, longitude, and direction of movement
Headset log	Plug in/off headset
Location changed log	Change location
Power connected log	Connect/disconnect the power
Power log	Power on/off
Screen log	Screen on/off
Service app log	Service app creation/resume/launch/stop/exit
SMS text message log	Number, contact name, and direction of SMS text message
Wallpaper log	Change wallpaper