Others' experiences may be different, but there's just one big elephant in the room with me and the people I talk to on cellphones, and that's bad carrier audio processing. Sure, people can hold phones wrong, and that can affect audio quality, and they can use headset microphones that get twisted, and that can affect quality, and there may be a few other issues, but none can compare to the magnitude of bad carrier audio quality in my experience, and this has nothing to do with hardware or positioning or environment.he carrier's audio processing isn't the whole story. How you hold the phone makes a difference; some people don't hold the phone's microphone close enough to their mouth. Some phones are equipped with HD Voice, but they only work if the network and the other phone also can accommodate HD Voice. The environment where you are can make a huge difference, but some phones have technology to cancel background noise. The big problem is that everything in the system - the phone, the network and the environment - has to work well for you to get good audio quality.
Interestingly, I happened to have a cellphone (both ends) conversation with a family member just tonight about a difficult situation, and the audio was surprisingly good -Some phones are equipped with HD Voice, but they only work if the network and the other phone also can accommodate HD Voice.