Fix very low call volume on OnePlus 3

I recently faced this issue after a recent update on my OnePlus 3. The guide at –¬†http://innov8tiv.com/fix-low-call-volume-oneplus-3t-calls/ is pretty good. However, the “Safe Mode” test failed for me, then next steps was clean with toothbrush. I was very much convinced that my ear piece was pretty clean and anyway I wiped it with cloth many […]