iPhone 6 ear speaker sounds muffled even after replacing the speaker piece.
I recently upgraded my phone to a new iPhone 7 and gave my iPhone 6 to my mother. She informed me that the ear speaker was sounding muffled and the phone calls sounded like "the other person was in a tunnel). I purchased a replacement ear speaker and installed it however the muffled sound still remains. The warranty on the Iphone 6 is way past its warranty but I wanted to see if there were any options besides buying a completly new phone or sending it off for weeks?
iPhone 6, iOS 10.0.2