oh my word I just discovered the most amazing exchange that I've somehow missed all these years in 2-4
I've always assumed that once you lock something behind a Psyche-Lock, if you click on the option again with the lock on it, the dialogue will be the same, but it's not! At least not in JFA.
So if you click on Matt's Psyche-Lock option after it appears and Phoenix asks him about the his secret, Engarde goes, "Hang on. I'm gonna consult my lawyer, OK?" and Phoenix's phone actually starts ringing. Validation that the wrist phone actually works!