The issue with phone number hashes has been known for a while. See for example this post by Project Zero[0] where they leverage the issue (search for "Enabling

The issue with phone number hashes has been known for a while. See for example this post by Project Zero[0] where they leverage the issue (search for "Enabling AWDL") to remotely activate airdrop. [0]: https://googleprojectzero.blogspot.com/2020/12/an-ios-zero-click-radio-proximity.html https://googleprojectzero.blogspot.com/2020/12/an-ios-zero-c...