| Media works; calls at ear are quiet | Earpiece mesh, earpiece speaker, connection or call setting | Test the same call on speakerphone | Inspect and test the top audio path |
| Callers hear you only on speakerphone | Primary microphone obstruction, damage or routing issue | Compare voice memo and camera video | Microphone-path diagnosis |
| All phone sound disappears near the car | Bluetooth is still connected | Switch Bluetooth off temporarily | Correct routing; repair may not be needed |
| Crackling began after a drop | Speaker damage, loose connection or frame deformation | Note whether pressure or movement changes it | Internal inspection after external checks |
| Muffled sound after moisture | Water in mesh/cavity, residue, speaker or board damage | Look for other liquid symptoms | Power down if exposure was significant; assess promptly |
| Only one app has no sound | App volume, permission, output selection or app fault | Test system sounds and another app | Software checks before hardware |