I finally moved from a Motorola 550 flip phone to a LG G3.. The LG phone call quality sucks. I have heard that the flip phones were for voice and the Smart phones are for data so the voice suffers on all Smart phones . Try a flip phone vs a smart phone and see.
I have a BB Bold 9650 and to be honest with you I had a Samsung Note 3, Iphone 5, Droid, and if you use your cell phone mainly for voice calls that little Blackberry has the best reception of all of them, hence the reason I went back to it. OK it's not as fancy as the other smartphones but for emails, texting, and basic apps, this for me is the best phone. The camera is also descent, OK not like the newest phones but I have a good camera to take pictures so I don't really care. I'm with Verizon by the way.
The problem now a days is that they try to put to much in a phone and forget about the main thing a cell phone was design for: talking!