Device Characteristic Data

ID	A unique identifier for a device or user. This can depend on the platform as well as the point of origin for the ID. One user is typically associated with multiple IDs: the mobile ad ID from their smartphone, hashes of their emails, browser cookies from various websites, etc. The full ID contains both an ID type and an ID value, separated by a colon. Common types of IDs include email hashes (sha1_email, md5_email) and mobile IDs (idfa, adid).	Always present
Timestamp	The time of the observation or data event, expressed as milliseconds from January 1, 1970	Always present
IP address	IP address of a given device	Optional
User agent	A string representing the device the event was collected on	Optional
Country code	A2 (ISO) country code	Optional
Carrier	Carrier or mobile virtual network operator (MVNO) that the phone belongs to	Optional
Device alias	Device make and model	Optional

Device characteristic data