TABLE I. Samples of the Collected Smartphone Usage Data, Where LTE and UTMS are Specific Modes of Cellular Network. User IDs Have Been Anonymized.

User ID	Timestamp	CPU usage (%)	Active memory (KB)	Free memory (KB)	Network	Battery level (%)	Timezone	MCC
1	2019-11-05 05:48:48	0.6992	3528	1875820	WiFi	66	America/Denver	us
2	2019-11-13 07:51:11	51.5152	429632	1746900	LTE	79	America/New_York	us
3	2019-11-16 12:31:51	53.1807	1006248	2853892	UTMS	94	Europe/Helsinki	fi