Just from one angle, the Bluetooth and Wi-Fi?
Geo-location via Wi-Fi & Bluetooth: Whether it is Android, iOS, Windows, macOS, or even Ubuntu. Most popular Operating Systems now collect telemetry information by default even if you never opt-in or opted-out from the start. Some like Windows will not even allow disabling telemetry completely without some technical tweaks. This information collection can be extensive and include a staggering number of details (metadata and data) on your devices and their usage.
Itemized lists:
Mitigation:
W10Privacy:
- Download and install W10Privacy
- Right-click > Run as administrator
- Check all the recommended (Green) settings and save.
- Optional but recommended (but could break things, use at your own risk), also check the orange/red settings, and save.
- Reboot
WindowsSpyBlocker:
- Download and run WindowsSpyBlocker
- Type 1 and go into Telemetry
- Type 1 and go into Firewall
- Type 2 and add Spy Rules
- Reboot
Also, consider using O&O ShutUp10++:
- Download and run O&O ShutUp10++
- Enable at least all of the recommended settings.
Settings > Privacy > Diagnostic > Delete all Data
You will need to update and re-run W10Privacy and WindowsSpyBlocker frequently and after any Windows update as they tend to silently re-enable telemetry using those updates.
As a bonus, it could be interesting to also consider hardening your Windows host. (This is a security guide, not a privacy guide.)
The Hitchhiker’s Guide to Online Anonymity
Disclaimer: I am the co-owner of THGTOA above.