Cell phone identifiers (both IMEI and IMSI) are easily and cheaply rotated for privacy. Car VINs are not.
Also, VINs and number plates are linked to (someone’s) strong government ID. Mobile phone IMEIs and mobile plan IMSIs are not; both can be obtained anonymously for cash, and given away or traded without a trace.
Also, VINs and number plates are linked to (someone’s) strong government ID. Mobile phone IMEIs and mobile plan IMSIs are not; both can be obtained anonymously for cash, and given away or traded without a trace.