Any chance you could make the walkthrough somewhat helpful by simply stating what the pin number for the phone actually is, please? I found the paper. It has 7 numbers on it, five of which have lines connecting to them and the pin is only four numbers long. I'm getting angry continuously failing as I try different number combinations and your walkthrough just states the obvious of "the pin is on a paper". On top of that, the first number on the paper... is that supposed to be a four? It looks like a 1 or a 7. And the things with the lines in them are 7's, I assume? I've never seen such god-awful number stylings in my life.
I'm legit giving up due to this pin BS. It is infuriating. Early in the game and already hating how hard a simple puzzle is and spent way too long trying to figure it out. Also, kinda a pain in the ass having to keep selecting "Inventory > Who > Use" every single time the pin I enter is incorrect.