I just upgraded to the Samsung 4 and am extremly dissappointed. When I try to talk or listen to a voicemail I am getting loud buzzing feedback noises and can barely make out what anyone is saying or listen to voicemail. My good old Cosmos didn't do this. Is there something in this phone that runs interference? Is there anything I can do to correct this problem? I do have the hearing aide box checked in settings. This happens wether or not I use the phone switch on my hearing aide. Please help! Am ready to return it. Thanks for assist.