I've had four HMD phones, two feature and two Android smart phones. The hardware usually feels really good, but all of them have had poor phone quality (even on different carriers). People would tell me if sound like I was underwater or far away from the phone while not using speaker), sometimes it would just drop the audio and I couldn't hear the other person, etc.

I guess I still have nostalgia for some of the late Nokia phones, like the n900 and e72.

My current Android HMD has been fine, but still has call issues (people often don't hear me for like 5-8 seconds when I call them; speak from just randomly stops working during calls).