[cpeterso]

iOS 8+ and Android 6+ devices do use a random MAC address for Wi-Fi scanning:

https://blog.mojonetworks.com/ios8-mac-randomization-analyze...

https://arstechnica.com/gadgets/2015/10/android-6-0-marshmal...

[rbcgerard]

Apparently not very well

https://www.theregister.co.uk/2017/03/10/mac_address_randomi...