The availability of Global Navigation Satellite Systems (GNSS) raw data for Android devices in 2016 significantly increased the possibility to analyze the positioning process implemented in the GNSS module of an Android smartphone. Before raw data were available, device users could only access GNSS data from the National Marine Electronics Association (NMEA), which contained only rudimentary GNSS information such as position, carrier-to-noise ratio (C/N0), speed over ground, and heading. It is known that due to the weakness of GNSS signals, the performance of GNSS receivers can be easily disrupted by anthropogenic interference, with Radio Frequency (RF) jamming and spoofing activities being critical threats.