Default help me! OPO can't do the main thing its suppose to - make calls! too quiet!

i've been using my OPO for about 2 days now and it does not do well the main thing it's suppose to - make calls!!!

it's sooooooooo quiet, which is it a bit odd. ALL sounds are loud (music, android sounds, videos, etc) but NOT calls!! i can barely hear the other person on max volume levels from both speaker and in ear. i do have the latest cyanogen installed but no idea why just the calls are so quiet. any ideas?!
Phone: Stock 64gb Black OnePlusOne