Simply hold a fine needle and try opening the pores of speaker grill delicately. Then clear it with a dry toothbrush. It worked for me. You may need a lense to zoom in 😁.
i did everything SamsungJace suggested. Restarted it afterwards. Still sounded muffled. Process of elimination. Took the protective case off. Then took the shatter proof glass cover off. There aren't ear holes made into the glass covers. So you either have to set it lower or do away with it entirely.
Had the same problem. But the advantage of this phone is I can smoothly play my favourite league of legend game on this.
Go to Settings>Apps>Click on the three dots at the top right corner>Show system Apps>Phone(All three)>Storage> Clear Cache/Data
Go to Settings>Apps>Click on the three dots at the top right corner>Show system Apps>Speaker detector>Storage> Clear Cache/Data
Let me know how this works for you.
This worked like a charm! I was afraid of losing contacts and such so i backed up my phone first to my7 computer. but it didnt cause any loss of contacts or call history