Table 3.

List of the sensors contained in smartphones used for the experiment.

Sensor	Description
Samsung Galaxy S8
SM-G950N Galaxy	S8 Octa-core, Adreno 540 GPU, Android 7.0 (Nougat), 4 GB RAM
Magnetometer (AK09916C)	3-axis, 16-bit, sensitivity 0.15 $\mu$T/LSB, temperature –30 to +85 ${}^{\circ }$C, 6.0 mA [43]
Accelerometer (LSM6DSL)	3-axis, 16-bit, sensitivity 0.061 mg/LSB, Temperature –40 to +85 ${}^{\circ }$C, 0.25 mA [44]
Gyroscope (LSM6DSL)	3-axis, 16-bit, sensitivity 125 mdps/LSB, Temperature –40 to +85 ${}^{\circ }$C, 6.1 mA
LG G6
LGM-G600L LG	G6 Quad-core, Adreno 530 GPU, Android 7.0 (Nougat), 4 GB RAM
Magnetometer (AK09915C)	3-axis, 16-bit, sensitivity 0.15 $\mu$T/LSB, temperature –30 to +85 ${}^{\circ }$C, 6.0 mA [45]
Accelerometer (BMI-160)	3-axis, 16-bit, Temperature –40 to +85 ${}^{\circ }$C, 0.18mA
Gyroscoope (BMI-160)	3-axais, 16-bit, Temperature –40 to +85 ${}^{\circ }$C, 0.9 m
LG G7
LM-G710N LG	G7 ThinQ Octa-core, Adreno 630 GPU, Android 9.0 (Pie), 4 GB RAM
Magnetometer (AK09918C)	3-axis, 16-bit, sensitivity 0.15 $\mu$T/LSB, temperature –30 to +85 ${}^{\circ }$C, 1.1 mA [46]
Accelerometer (IAM-20680)	3-axis, 16-bit, Temperature –40 to +85 ${}^{\circ }$C, 0.24mA [47]
Gyroscoope (IAM-20680)	3-axais, 16-bit, Temperature –40 to +85 ${}^{\circ }$C, 1.25 mA [47]
LG Q6
LGM-X6OOS LG	Q6 Octa-core, Adreno 505 GPU, Android 7.1.1 (Nougat), 3 GB RAM
Magnetometer (AK09918C)	3-axis, 16-bit, sensitivity 0.15 $\mu$T/LSB, temperature –30 to +85 ${}^{\circ }$C, 1.1 mA [46]
Accelerometer (BMI-160)	3-axis, 16-bit, Temperature –40 to +85 ${}^{\circ }$C, 0.18mA [48]
Gyroscoope (BMI-160)	3-axais, 16-bit, Temperature –40 to +85 ${}^{\circ }$C, 0.9 mA [48]