I don't want anything I use to have the ability to be unlocked by police without a warrant.
"Police are not allowed to demand someone to provide their pass code because that would be deemed “testimonial” and go against Fifth Amendment protections from self-incrimination."
@jchaven @mlanger just an fyi: on iPhone, if you show the power-off screen you can lock the phone until the passcode is entered again.
A person could do this subtly, without looking, by squeezing their phone for a few seconds. Relevant if they have >6 seconds preceding loss of control of the device.