alt Hacker NewsGrapheneOS has a feature to scramble the locations of the numbers on the passcode unlock screen to prevent this exact problem
GrapheneOS has a feature to scramble the locations of the numbers on the passcode unlock screen to prevent this exact problem
That can be helpful only if surveillance cannot film the screen directly, and surveillance relies on the position of the fingers. Given modern 4k cameras it's unlikely the latter can be done but not the former.