u/Busy-Cow-7576

So say I have a 10 to 11 digit pin the os lets me use a 4 digit pin for the duress pin but any time I enter it it doesn't work does it have to also be 10 to 11 digits? I want it short an simple just in case I'm forced to give it up or need to enter quickly an 10 to 11 isn't quicky also is there a way to set up duress finger print? Maybe duress message I seen wasted on f droid but not sure if it works any pointers or directions to research would also be very much appreciated thanks in advance TL;DR imma newbie thts trying to bump up mobile opec