low volume on phone calls

WilDeliver wrote:

• iPhone 11Pro. Volume on incoming or outgoing calls is VERY low - barely audible. Turning on speaker works fine, but everyone in the room listens to my call (eyeroll). Volume on ring tones, alarms, music, etc. are all fine.

This is apparently a common issue (based on large number of Google hits) and I tried all the various online suggestions without success.

Volume buttons down and up

• Silence switch on and off

• No case or screen protector blockage

• iPhone speakers clean

• Settings: Airplane mode on and off

• Settings: Bluetooth on and off

• Confirm Bluetooth works properly

• Not redirecting to Bluetooth device

• Disable noise cancellation

• Restart iPhone

Called Apple support, which decided that "it is a hardware problem." How can that be when the sound hardware works fine with everything except phone volume - doesn't seem to make sense. Suggestions appreciated. Thanks.

You can run a diagnostic–

How to put your iPhone in diagnostics mode - identify potential hardware and software issues

How to put your iPhone in diagnostics mode - Apple Support

Turn the Phone Noise Cancellation off

for iPhone call volume low.

Settings >General > Accessibility>Audio/Visual> option see

turn off the Phone Noise Cancellation feature and compare your results

general ref https://www.lifewire.com/fix-low-volume-on-call-on-iphone-5186012