When your Samsung Galaxy S24 microphone stops working, it can make phone calls, video chats, and voice commands with Bixby unusable. The first step is to figure out if the problem is with a specific app or the phone itself.
Test Your Galaxy S24 Microphone
Open the Voice Recorder app that came pre-installed on your phone. Tap the red record button and speak for a few seconds. Play it back to see if your voice sounds clear and loud.
You can also test it during a call. Call your voicemail and leave a message, then listen back to check the audio quality. If people can't hear you on calls but your recordings are fine, the issue might be with the call audio routing.
Remove Your Phone Case
This is the quickest thing to try. Some cases, especially rugged ones with port covers, can accidentally block the microphone holes. Take the case off completely and test a call or recording again.
The S24 has several microphone openings. Check the small pinhole at the bottom next to the USB-C port, another at the top of the frame, and one on the back near the camera module. Make sure none of them are clogged with lint.
Restart Your Phone
A simple restart clears out temporary software glitches that could be affecting the audio system. Press and hold the Volume Down button and the Side button (power key) together for about 10 seconds until you see the Samsung logo.
I've found this fixes microphone issues more often than you'd think, especially if the problem started suddenly after using a particular app.
Disconnect Bluetooth Accessories
If your Galaxy Buds, a headset, or a car stereo is connected, your phone might be trying to use that microphone instead. Swipe down from the top of your screen to open the Quick Settings panel and tap the Bluetooth icon to turn it off.
Now try making a call without any accessories connected. If the microphone works now, you know the issue was with the audio routing. You may need to check the settings on your Bluetooth device.
Check App Permissions
Apps like WhatsApp, Google Meet, or Instagram need explicit permission to use your microphone. Go to Settings > Apps, select the app giving you trouble, and tap Permissions.
Make sure the Microphone permission is set to "Allow." If it's denied, that's why the app can't hear you. Toggle it on and test the app again.
Close and Reopen Problem Apps
If only one app has microphone problems, force close it completely. Swipe up from the bottom and hold to enter the recent apps view. Find the app and swipe it all the way up off the screen.
Wait a few seconds, then tap the app icon to reopen it fresh. This clears the app's temporary memory and can resolve conflicts with the audio hardware.
Update Your Software
Software bugs in One UI or Android can sometimes cause microphone failures. Samsung releases updates to patch these kinds of issues. Go to Settings > Software update and tap Download and install.
Make sure your phone is connected to Wi-Fi and has at least 50% battery before starting the update. An update in 2025, for example, specifically addressed audio routing problems during video calls for some S24 units.
Check for Moisture Detection Errors
The Galaxy S24 is known to sometimes show a false "moisture detected" warning in the USB-C port. This safety feature can disable certain functions. If you see a water droplet icon in your notification panel, it might be interfering.
Power the phone off completely. Use a can of compressed air to gently blow into the USB-C port to dislodge any debris. Let it sit for an hour, then power it back on to see if the warning clears.
Reset All Settings
This will revert all your system settings back to default without deleting your photos, messages, or apps. It can fix misconfigured audio settings that are hard to find. Go to Settings > General management > Reset > Reset all settings.
You'll need to re-enter Wi-Fi passwords and reconfigure things like ringtones and display brightness, but it's often faster than a full factory reset. Your personal data remains safe.
Boot into Safe Mode
Safe Mode temporarily disables all third-party apps you've downloaded. If the microphone works perfectly in Safe Mode, you know a recently installed app is causing the conflict. To enter Safe Mode, press and hold the power button until the "Power off" option appears.
Then, tap and hold the "Power off" text on your screen. A prompt to reboot into Safe Mode will appear. Tap it. Test your microphone here. To exit, just restart your phone normally.
Perform a Factory Reset
This is your last resort before considering a hardware repair. A factory reset will erase everything on your phone, so you must back up your data first. Use Samsung Cloud or Smart Switch to back up your photos, contacts, and messages.
Once backed up, go to Settings > General management > Reset > Factory data reset. Tap "Reset" and confirm. After the phone erases itself and reboots, set it up as new and immediately test the microphone before restoring your backup.
