I just got my S5 Neo a few days ago, and have noticed sound distortion ever since I made my first call.
Model number is SM-G903W
Android version 6.0.1
If I make a call, the first ring will be crystal clear, then there will be a slight click, and the sound quality goes downhill. It sounds distorted and hollow. I can hear them, and they can hear me, but it sounds really bad.
I've been looking around online but haven't seen anyone mention this particular behavior. I tried wiping the cache, as outlined on this site
But it made no difference.
Can someone offer some help or suggestions?