iPhone XS, XS Max, and XR Sounds Muffled? Here's the fix - iPhone Topics
How to clean iPhone speakers and improve the sound quality | Tom's Guide
iPhone Muffled Speaker? Here's How to Fix It
My iPhone X right speaker is constantly muffled unless I turn it sideways to the left. Anyone else run into this issue that figured out the fix? : r/iPhoneX
How to Clean Your iPhone Ear Speaker - Fix Muffled Sound on Calls - YouTube
iPhone Ear Speaker Not Working? Try These 11 Fixes