

Or at the very least; turn your phone entirely off (shutdown) whenever you expect or encounter police contact.
Biometrics only work when the device is already running. Mobile devices are in their most locked down/secure state when ‘at rest’, ie shutdown.
In android; there is also a ‘lockdown’ mode you can quickly activate from the power off screen, that disables Biometrics until next unlock with a pin/pattern, but doesn’t fully shutdown so you can still quickly access things like the camera. This has to be explicitly enabled in settings first and will not offer much protection from various lockscreen bypass software available to law enforcement.




It may well be on by default now. I just know I had to enable it the last time I looked at this.
Tools such as those provided by Cellebrite and similar.
Lockdown mode is mainly to disable biometrics, to prevent someone on the street forcibly using them to unlock your device. It’s not going to stop an entire agency with more sophisticated tools.