Fix iPhone Sound Not Working During Calls

The Problem: You can't hear the other person, or they can't hear you. The speaker button might be greyed out.

The Short Answer: This could be lint in the earpiece. However, if the Speaker button is greyed out on iPhone 7/8, it is the dreaded "Loop Disease" audio chip failure.

Method 1: Clean the Earpiece Mesh

Ear wax and dirt clog the speaker grill. Use a dry toothbrush to gently scrub the top mesh.

Method 2: Check Bluetooth

Your audio might be routed to a Bluetooth speaker in the other room.

• Swipe to Control Center.
• Tap the AirPlay icon (top right of music box).
• Make sure it is set to iPhone.

Method 3: Disable Noise Cancellation

Sometimes the noise cancelling algorithm cancels your voice by mistake.

• Go to Settings > Accessibility > Audio/Visual.
• Turn off Phone Noise Cancellation.