Build - Version 4.4.2-20140316 N7105
Kernel - based on omni stock kernel.
All my recipients claim that they can't hear me and i can't hear them clearly.. my in-call volume is already at its max.
is there any settings that i need to adjust?
Go to themes and apps section, look for sound mod which supports all roms, follow instructions, volume should be more now, don't think this will fix the problems of your recipients hearing low sound.