I've been frustrated with the quality of my mobile phone calls for....ever. It seems like it's been worse, or at least more noticeable, for the past couple of years. I think analog calls had more potential for better call quality since there was not digital voice sampling, etc., but digital holds promise for more consistent call quality even when signal strength isn't the best. That's my understanding, at least. I need to post and run, but will be back shortly. Just a quick couple of comments or questions to start: 1. Sprint's HD Voice doesn't work with other carriers. What about the other big 3 carriers? For example, if a T-Mobile customer calls someone on Verizon, will the call quality be HD Voice? 2. Mobile calling to landlines....I suppose HD Voice won't work there. 3. I think part of the issue I'm having is my phone (LG G2). Using a headset (wired or any of the various high-end sets I've tried) doesn't help. 4. I really, really want to have better call quality. I'm hoping to work for a former client, and they allow some opportunities to work from home. Unfortunately, call quality would be critical. If I were to switch to Project Fi, I'll have a different smartphone and possibility of being on Sprint, T-Mobile, or WiFi for calls. Am I taking too much of a risk for poor call quality? Sorry to run! Hopefully this topic will have some interest for you. EDIT: I don't think the issue I'm having with call quality is my hearing, by the way (you silly people).