I am using S8 plus but when I use back cover my speaker voice is weird as soon as I remove my cover it get back like normal and I have purchase the back cover from the Samsung store there is some hardware problem in S8 Plus. its only 18 days old and it's feel shame that I took this phone to a service station as this one is a brand new phone.
Thanks for being with Samsung and for sharing your concern. We would like to inform you that we have dedicated support team for service issues, so we will request you to kindly send us your concern with contact details so they will batter assist you in this regards on provided link http://www.samsung.com/in/support/erms/
