I think it's fairly obvious why one would want two-way audio on a telephone :)
As I mentioned in my comment, I don’t notice the worse Bluetooth quality on calls because the audio itself is already bad, so making calls isn’t really a reason to not use Bluetooth.
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As I mentioned in my comment, I don’t notice the worse Bluetooth quality on calls because the audio itself is already bad, so making calls isn’t really a reason to not use Bluetooth.