I have an Honor 10 that I want to use with my Sony WH-CH700N wireless headphones to listen to spotify. These headphones support apTx HD. Now I know that both devices must have this turned on to use it. So I went into the developer options of the Honor 10 where the bluetooth audio codec must be able to be adjusted. I cannot press this option if I am not connected to the headphones with Bluetooth. When I am connected I can click on it, and I see apTx HD in the list. I just can't click on it. It automatically remains on the SBC audiocodec. And it says in very light letters: system options follow standard. I've been going through a lot in the phone and trying different things out, but can't seem to get it working.
Of course I would like to use the apTx HD technology, does anyone perhaps know how I can turn it on?