Sensor calibration settings can be used by apps/sites to fingerprint iOS and Android phones.

We added a "Lockdown Mode" for the Librem 5 which allows you to defend against this.

Librem 5 Lockdown Mode: https://puri.sm/posts/lockdown-mode-on-the-librem-5-beyond-hardware-kill-switches/

Sensor Calibration Attack: https://www.zdnet.com/article/android-and-ios-devices-impacted-by-new-sensor-calibration-attack/