> How else are they going to track people with a hard-to-change identifier?
Using the device advertisee ID that the user is entitled to change.
// Sorry, for a moment I thought you were serious.
Using the device advertisee ID that the user is entitled to change.
// Sorry, for a moment I thought you were serious.
Ignoring the security pitfalls of phone numbers, it really doesn't seem like these advertising IDs are a drop in replacement for using phone numbers.