I just bought a new phone - same carrier, metropcs - and all is well except when I talk to my best friend. The call is so full of static that I can barely understand him. He says on the other end that I sound great. A thing about his setup: He has an old iphone that is nolonger on a plan. He is using some voip service to make calls (no idea what. All I know is he has to be on wifi, and can't make outbound calls. I know, I know.). He also has a pretty slow internet speed. So, I am guessing that all of this has something to do with the problem. However, on my old phone - again same carrier - I did not have the issue. I noticed that this phone is displaying "hd" on all the other calls (again, the other calls are fine. In fact they sound better). Could this have anything to do with it? Anyway, anyone have any suggestions as to how to get decent sound quality with him?