My wifes S8 has an echo on the callers phone no matter what phone or carrier they have. I have tried all the normal fixes on Youtube, checked all the settings, restarted the phone, restarted the phone in safe mode, her phone called mine while in safe mode still had echo.I made sure her software was up to date, I even reset the phone after backing up her phone to the samsung cloud. The echo is still there. I also blew out the mic and speakers with canned air no luck yet. Any help would be much appreciated as it is very annoying thanks.