Voice Call Echo issue

I love that there is Kakao for talking to relatives overseas but the quality of the call is very bad. There has always been an echo from my end of the line (USA).
So as much as I appreciate this function, it would be VASTLY more appreciated and used if there wasn’t an annoying echo problem that makes you lose your train of thought hearing your voice echo back what youre saying 3 seconds later.

jigga314 about KakaoTalk