I am unable to switch to HSP/HFP mode, it works only in A2DP (only speaker works). And i have already tried this solution and it got mic working, but when i selected HSP/HFP, i got too much noise in speaker (A2DP Sink gives clear sound).
It works fine on windows 10 (Same PC) and my android phone. And i checked on OnePlus site, and i can't find whether it supports HSP/HFP or not.
