You're calling the wrong people, or people on the wrong networks. I am on Verizon, and certainly if I call another Verizon customer (and I'm pretty sure if I ca

You're calling the wrong people, or people on the wrong networks. I am on Verizon, and certainly if I call another Verizon customer (and I'm pretty sure if I call another carrier), it sounds as clear as if we were in the same room, as good as FaceTime audio or any other high fidelity voice system. You may just not realize it until you call someone else and compare, or hear someone move from their car's older Bluetooth system to cellular when they get out of the car (or headphones, etc), but voice quality has definitely improved to the point of not needing to improve further.