Not wired for phone USB-C

I bought this for a smartphone. I was recording into the headphone jack, getting static, so I wanted to try the USB port to see if it was cleaner. The mic input is cleaner, so the main mission is accomplished. BUT - plugging into the headphone side does nothing. The output still comes through the phone speakers. Having researched phone inputs for a few months, I suspect this is a case of backward TRRS connections, this being designed for computer inputs. Research for yourself, you'll see what I mean - there are two "standard" TRRS wirings. I'm keeping it, I'm happy with it, I can still plug my 3.5mm headphones into the headphone jack while plugging my 3.5 mic jack into USB through this gadget. Just be aware - on a phone, it only does half the job.

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