The last two I tried had some of the crappiest sounding audio I’ve ever heard out of a premium phone. I have a $100 wired headset I’d like to use.
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I use Anker’s $15 “USB C to 3.5mm Audio Adapter, Male to Female Nylon Cable for Samsung S20/S20+/S20 Ultra, Pixel 4/+ 4XL, and More Type C Devices” in my 6a with my m40x’s for music streaming and it is good enough™ so far
The only resource that I have ever checked in this matter is this video have you checked it? Hope it helps
His verdict is that they’re all basically the same, but that has not been my experience. At least it wasn’t a year or two ago. Hoping the next one I buy is from a new era.
Buy a Sony phone. It has a headphone jack
Soon as they sell a high quality folding phone. Though if they do, they probably won’t have a headphone jack on that model.
You could try the other way and get a Bluetooth adaptor to plug into your wired headphones? You might get better sound quality that way.