If people cannot hear you on a Galaxy S23, find out which microphone is quiet. The bottom port carries your voice on a normal call, a port near the top helps cancel noise, and a rear one serves video. A case with a misaligned cutout, a covered port, a paired Bluetooth device or a missing app permission explain most faults. A Voice Recorder test on the handset and on speaker phone separates a software fault from a hardware one in a minute.
Differential
Likely causes of “Samsung Galaxy S23 microphone is quiet, muffled or not working”, and how to tell them apart
- 1
A covered or clogged port
What separates it A faint voice on calls and a quiet Voice Recorder clip
How to confirm Take the case off and check the bottom edge holes with a flashlight
- 2
Bluetooth routing the audio away
What separates it Callers hear nothing while the phone seems normal
How to confirm Swipe down and turn Bluetooth off, then test again
- 3
An app permission switched off
What separates it One app only cannot hear you
How to confirm Settings, Apps, the app, Permissions, Microphone: Allow only while using the app
- 4
Noise suppression in a call app
What separates it A muffled voice on one app only
How to confirm Check the app's own audio settings or test in the Phone app
- 5
Water or a hardware fault
What separates it A faint voice everywhere, including Safe mode
How to confirm Samsung Members, Phone diagnostics, Microphone
- 6
A screen protector or case lip over the opening
What separates it The clip is faint only when the phone is in its case
How to confirm Remove the case and film at the bottom edge and record again
Before you touch a setting
Record this first — changing settings destroys the evidence
- Whether the fault is on calls, video or voice recording
- Whether speaker phone or handset changes it
- Case and screen protector fitted
- One UI version and patch date
Try in this order
0 of 6 completedRemove the case
ReversibleTake off the case and any film over the bottom edge, then place a call.
Record a voice note
ReversibleOpen Voice Recorder, say a sentence and play it back, once on the handset and once on speaker phone.
Turn Bluetooth off
ReversibleSwipe down and switch Bluetooth off so a pair of earbuds elsewhere does not take the audio.
Check app permission
ReversibleSettings, Apps, choose the app, Permissions, Microphone.
Run diagnostics
ReversibleSamsung Members, Get help, Phone diagnostics, Microphone.
Test in Safe mode
ReversibleHold the side key, touch and hold Power off, tap Safe mode. If it works there, an app is interfering.
Model-specific
What is true of this model and not of its siblings
- Placement on the S23
- The voice microphone is at the bottom edge by the USB-C port, so a case with a small cutout is the first check.
- Records and calls
- Voice Recorder uses the same microphones as calls, which is why a recorder clip is a reliable test.
Stop boundary
When this stops being a self-service repair
- !If Phone diagnostics fails the microphone in Safe mode, book a repair
- !If the phone was wet and the mic is muffled, let it dry for a day before service
- !If only one app fails, contact that app's support
Evidence ledger
Sources behind this answer
Exact questions
Common questions
How many microphones does an S23 have?+
More than one: a bottom port for your voice, a top port for noise cancelling and one for video.
Why can they hear me on handset but not on speaker phone?+
The two modes use different microphones; the recorder test shows which one is failing.
Is the S23 microphone waterproof?+
The S23 is IP68 rated, but seals age and water in a mic port muffles it until it dries.
Will a factory reset fix a quiet microphone?+
Only if the cause is software; test in Safe mode and with diagnostics first.
Why do callers hear me faintly on my S23?+
Most often the case or dirt covering the bottom opening; take the case off and test.
Does wind affect the S23 microphone?+
Yes; noise suppression can clip your voice in wind. Move the phone away from the breeze or use a headset.