Low iphone 6 earpiece volume since latest update
Hi, Since 19 Nov I am facing a peculiar issue with iPhone 6 where volume of earpiece has reduced by more than half. I barely can hear caller. Instead I can hear the caller clearly on Headphone or Speaker. So only issue is with earpiece. I tried all setting and tried reset option as well but no avail. The iPhone was purchased in Nov 2014, completed 3 years without any issue. To add, there is no fall in recent time that would have caused this issue. Recently I upgraded to latest iOS 11.1.2. Please assist.
iPhone 6, iOS 11.1