Didn't work. Didn't even detect it as headphones, let alone mic.
Then I tried this one, which is "trrs," because several HTC phones work with it according to reviews:
Headset Buddy01-PC35-PH35) PC Headset to 3.5mm Smartphone Adapter
Same exact results as the two-dollar wire.
Nothing has worked!
Is so irritating that is so hard to use an external mic with a high-end phone like this.
Can anyone help?!