Lumia 640 LTE - Headphones Not Working?

[Windows Central Question]

I have a set of Skullcandy Lowrider headphones - not designed for anything in particular, as far as I can tell. My Lumia 640 LTE doesn't seem to register them when I plug them in, even after a reset. The headphones work with my laptop and old Lumia 520, and I tried another (old) pair of (broken) headphones, which were picked up.