Issue Description
You can’t hear the caller clearly, audio is distorted, or sound switches unexpectedly.
Common Causes
Bluetooth routing audio
Dirty speaker or earpiece
Network signal fluctuation
Step-by-Step Solution
Step 1: Disable Bluetooth
Settings → Bluetooth → OFF
Ensure audio isn’t routed to another device
Step 2: Increase Call Volume
Press volume buttons during call
Step 3: Clean Speaker and Earpiece
Use soft brush or dry cloth
Step 4: Restart iPhone
Clears audio routing glitches
Explore Further
Test call using speakerphone
Prevention & Best Practices
Keep speaker areas clean.