Yes, it’s been installed on my Android phone without any notice to me. Disabling Bluetooth unfortunately disables the sync with my car radio that allows hands free operation of the phone...required by law in my state. This is total crap. I will be further researching how to disable this invasion of my privacy. I hope Google gets hit with a big class action lawsuit.
p
https://support.google.com/android/answer/9888358
By default it’s turned off.
“How Exposure Notifications work
When you turn on Exposure Notifications within an app from your region’s government public health authority, your phone shares random IDs with other nearby phones that also have turned on the Exposure Notifications System.
Throughout the day, your phone and the phones around you exchange random IDs. When your phone detects a random ID from another device, it records and stores the ID.
If someone reports having COVID-19 and their ID is stored on your phone, the app will notify you of next steps to take.”
It is on at least one of my Android tablets.
I never take it anywhere and only started using Bluetooth when I bought a speaker a few weeks ago.
My phone is not smart. And I like it that way.