While this could be a hardware issue, there are also easy-to-fix, software-related problems you should consider.
How Do You Fix Low Call Volume on iPhone?
Turn the volume up on your phone.
The thing about it is, you have to do it while you’re on a call.
Confirm that your phone case or screen protector isn’t blocking your speakers.
If they are, it could make the audio sound muffled or garbled during phone calls.
Clean your iPhone speakers.
Speakers full of lint and dust is a common reason for muffled call volume.
Flip the silence switch on the side of the phone.
Toggle Airplane Mode on and off.
Low in-call volume can sometimes be fixed by switching between this mode a few times.
Sometimes, devices need a good restart.
Use Control Centerto see if the audio is being transmitted through the phone or a Bluetooth equipment.
Disconnect that unit to restore audio to your iPhone.
see to it your gear is entirely up to date, then try making your calls again.
Know, however, that sometimes an update from Apple seems to actuallycausethis low volume problem.
A driver issue could interfere with call volume and sound delivery; updating can fix the problem.
Only iPhone 12 and earlier have this feature.
You might have accidentally toggled the volume rocker while on another call.
It’s also possible there is an obstruction preventing you from hearing the other caller.
Or you could have a software or hardware problem.
We have all thefixes for when there’s no sound on your iPhone.
FAQ
Your microphone or call volume is low or muted.
There could also be a problem with your microphone.
verify it’s not clogged with dust.
You could have a volume limit set.
Go toSettings>Musicand check that theVolume Limitslider is all the way to the right.