I'd have no way of knowing ATM, it may be in conjunction with the person's phone. https://t.me/projectcamelotKerry/2714 I ran a test of the post above this morning at the local gym and what I saw under available bluetooth devices was a large number of what appeared to be computer hardware addresses. The number was roughly equal to the number of people in the gym. Mixed in were 3 or 4 that were just the name of the phone or brand. Mine also appears that way but I am unvaccinated. Now it could just be that most people's phones are only broadcasting the phone's hardware address, for some odd reason. Another test I have yet to run is whether they change periodically. Hardware addresses don't change periodically but these numbers allegedly do refresh, according to the post above. I have a friend that I know is vaccinated, I may try it the next time I see him.