Rispondi a "Why do callers hear an echo during phone calls?"I finnaly found that the problem became from the extra shell case i used. so avoid any extra shell case to make a test. That's the solution a found whith mine. I think that the extra case (not a samsumg case) genarate echo because of the 2 microphones on the top and the bottom, I don't know why but I think that the case act like a echo box.