An Apple airtag probably doesn't but it is apparently possible to send some data at a very low rate (the article in [1] says a few bits per hour) over the find my network [2]
replyThat's functionally the exact same thing, and if they wanted to send data they could encode it in the "ID".
replyuh, that is just all the iphones acting as a mesh network for airtag ID’s?
replyit means you can’t block the tracking by doing anything yourself - you’d also need to block everyone else’s devices too.
Mesh network typically means… a network. Unidirectional, best-effort, randomized IDs are not a network.
replyAnd of course you can block the tracking yourself, even though nobody is actually tracking because Apple can’t tell who owns what ID. Just turn off find my on your device.