I recently upgraded my S9 to S21 Ultra and as everyone knows these new phones don't have a headphone jack. I did a little research and settled on the JSAUX headphone adapter. I have 2 packs so I can have one at home and one in the office (which I recommend) because you don't want to forget the stupid adapter if you need it. I also chose red so I can easily locate the adapter in my desk drawer when needed. By the way, red looks really nice. Upon receipt, I ran some basic tests. Music playback no problem. I called, no problem. general. As for the quality? I do not know. Sounds the same to me. I only use cheap Apple headphones (with built-in microphone). So I can't really judge the quality. Sounds about the same as an S9 with a headphone jack. Be honest with cheap Apple headphones. Hope this helps someone.
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