when I was on a call today using the headphones, sound was echoing, but that is the only call i've used them for so i will have to see if it happens with other people. Everyone says they can hear me great, but I don't always hear them that well with the phone to my head. I have the volume cranked (i think). Will have to see what it is like with bluetooth, but I like it to be real clear and loud when I hold it to my head. I have a powersupport crystal film over the screen, but the cutout for the ear speaker is bigger than the speaker, and doesn't cover it at all. I could try repositioning it or testing with it off, but I doubt that's it. And I agree that it doesn't ring loud enough. I have the marimba all the way up.