Have downloaded the update but it says file error and it shows i download again..Don't no If it will repeat the same feet

Since I updated dialer or "phone " as it's stated in the galaxy apps iconI hav been having this problem of low or much less sound during calls unlike in the past where it was so audibleWat cud be the cause ??

I hav received the September update that claims the camera has a super slow motion update but I don't see it why??

Why doesn't the led view cover icon indicator app doesn't open on my s8