You answer a call and the other person says they cannot hear you at all. You can hear them perfectly and your phone looks normal on the screen. That one-way silence is stressful because you do not know whether the fault sits in your phone or in the network.
A microphone can fail on calls while it still works for voice notes in some cases. Call audio uses a different path and different permissions from a recording app in many phones. A blocked permission or a second app holding the microphone can therefore break calls while leaving other audio untouched. The good news is that most call microphone faults have a simple cause. A one-way silence is not the only call fault that misleads you, since call echo and noise interference can make a working microphone sound broken to the other person.
This guide gives you seven quick solutions in a logical order. Start with the fastest checks and move to deeper settings only if the early steps fail. Test with a real call after each step so you know exactly which change fixed the problem.
Check for a blocked microphone hole first
Find the small microphone hole at the bottom edge of the phone and check it for dust or pocket lint. A blocked hole muffles your voice and it can make you sound distant even when the microphone works. Use a soft brush to clear the hole and never push a sharp pin deep into the opening.
Remove a case that covers the microphone hole or presses against the bottom edge. Some cases shift slightly and cover the hole just enough to ruin call audio. Make a test call without the case and ask the other person whether your voice sounds clearer. If it does then the case was the problem and you need a case with a proper cutout.
Check whether a screen protector or a sticker covers a secondary microphone near the top of the phone. Modern phones use more than one microphone for noise cancellation during calls. Covering the top microphone can confuse that system and make your voice sound thin or broken.
Test the microphone outside a call
Open the voice recorder app and record a short sentence in a quiet room. Play it back and listen for clarity and volume. If the recording sounds clear then the hardware likely works and the problem sits in call settings or permissions.
Try a video recording with the front camera and then with the rear camera. Each camera can use a different microphone on some models. If one recording sounds good and the other sounds muffled then you have a clue about which microphone needs attention. Share that detail with a repair shop if you later need professional help.
Make a test call on speakerphone and then on a normal earpiece call. Speakerphone uses a different microphone setup on many phones. If speakerphone works but a normal call does not then the bottom microphone is the prime suspect. If neither works then permissions or a system fault are more likely.
Fix permissions and app conflicts
Open Settings and then open Apps and then open the phone app and check its microphone permission. Set it to Allow only while using the app if that option exists on your phone. A denied permission can silence calls without any warning on the call screen.
Close apps that might hold the microphone in the background such as a voice assistant or a recording app. An app that locks the microphone can block the phone app from using it during a call. Restart the phone after closing those apps so the microphone releases cleanly.
Check whether a Bluetooth headset or a car system is connected without you noticing. A connected Bluetooth device can route your voice to a distant headset microphone instead of the phone microphone. Disconnect Bluetooth for one test call and see whether the other person hears you clearly. If you also face pairing drops then the steps for fixing Bluetooth pairing and dropping connections can help you separate a Bluetooth fault from a microphone fault.
Check network and call settings
Try a call over Wi-Fi calling if your carrier supports it and compare it with a normal mobile call. A poor mobile signal can compress your voice and make it sound broken even when the microphone is fine. Wi-Fi calling bypasses that weak signal path for the test.
Turn off noise suppression or enhanced calling features for one test if your phone offers them. Those features aim to remove background noise but they can also cut out a quiet voice. If your voice returns after turning the feature off then leave it off or update the phone software to fix the feature.
Check for a system update and install it if one is available. Microphone drivers and call audio fixes often arrive in small updates that do not mention the microphone in the headline. Restart the phone after the update and test again before you try a factory reset.
adb shell dumpsys audio
adb shell pm grant com.android.phone android.permission.RECORD_AUDIO
adb shell settings get global mic_mute
The commands above were prepared for this guide and they use only standard tools that ship with Android developer tools. They show audio state and permission state for advanced users who want to confirm a setting before changing it.
While you work through these steps it helps to compare symptoms with other fixes in the same area. For example the steps for speaker crackling problems show how a related fault behaves differently and the steps for Bluetooth pairing problems help you rule out a second fault that shares early symptoms.
Common mistakes
One common mistake is assuming the microphone is broken after one bad call on a weak signal. Test in a strong signal area and with a second contact before you conclude that hardware failed. Another mistake is covering the microphone with a finger during a call while holding the phone tightly.
Another mistake is granting microphone permission to many apps and leaving a recording app running in the background. That app can hold the microphone and block calls. Close unused audio apps before an important call.
A third mistake is jumping straight to a factory reset without testing a case or a Bluetooth device first. A reset takes hours to restore and it rarely fixes a blocked hole or a connected headset. Save the reset for the end of the process.
A week-long microphone test that proves the fix
Make one test call each day to the same contact and ask them to rate your voice clarity from one to five. Use the same room and the same case status for the first three days so the rating means something. A rising rating after you clean the microphone hole or remove a case shows that the physical change helped. A flat rating after physical changes points to permission or software causes instead.
Record a voice note each morning before any calls and listen to it with headphones. A voice note uses a different path from a call in some phones and comparing the two helps you separate hardware from call routing. If the voice note sounds clear while calls sound muffled then Bluetooth routing or call settings deserve more attention than the microphone itself.
Test a call with a headset on day four after the phone microphone tests settle. A headset test tells you whether the phone can handle call audio at all when the built-in microphone is bypassed. If headset calls sound perfect then the built-in microphone path is the focus. If headset calls also fail then network or account settings need a closer look.
Long-term habits that protect call audio
Check the microphone hole whenever you change a case. A new case can cover a hole that an old case left open and the change can appear suddenly after a case swap. A quick visual check after fitting a case prevents a week of muffled calls.
Close recording and voice assistant apps after you finish using them. An app left running can hold the microphone and block the next call without any visible warning. A habit of closing audio apps after use keeps the microphone free for calls.
Review microphone permissions after every major update. Updates can reset permissions for the phone app or for a calling app. A quick permission check after an update prevents a surprise silent call at an important moment.
What to do when the first seven checks fail
Book a microphone hardware test if cleaning and permission and Bluetooth tests all fail. A hardware test uses diagnostic tools that can check each microphone separately. That test gives a clear answer without guessing about internal parts. Take your test notes to the appointment so the technician does not repeat steps you already tried.
Check whether the fault appeared after a drop or after water exposure. A drop can loosen a microphone connection even when the outside looks fine. Water can corrode a microphone over days even when the phone worked right after exposure. That history helps a technician focus on the right internal area.
Use a wired headset as a reliable workaround while you wait for repair. A headset bypasses the built-in microphone and it restores clear calls immediately. That workaround keeps work calls going without forcing an urgent repair at a high price.
Keep a backup of call logs and contacts before any hardware repair. A repair shop may reset the phone during testing and a backup protects that data. Cloud sync for contacts is usually enough but check it before you hand over the phone.
Frequently asked questions
Why can people hear me on speakerphone but not on a normal call?
Speakerphone and normal calls can use different microphones on the same phone. A blocked bottom microphone can ruin a normal call while speakerphone still works through another microphone. Cleaning the bottom hole often fixes that pattern.
Why does my microphone work in recordings but not on calls?
Recordings and calls can follow different audio paths and permission rules. A phone app permission problem or a Bluetooth routing problem can affect calls only. Check the phone app permission and disconnect Bluetooth to isolate the cause.
Should I replace the microphone if cleaning does not help?
Replace or repair the microphone only after permission tests and software tests fail. A repair shop can test each microphone separately and confirm a hardware fault. That test saves you from replacing a part that was never broken.
Conclusion
A silent microphone on calls usually comes from a blocked hole or a permission or a connected device rather than a dead part. Clean the hole and remove the case and test with a recorder before you change settings. Disconnect Bluetooth and check the phone app permission and restart the phone after each change. If all seven checks fail then book a hardware test with that test history ready. Start now by recording a ten second voice note and making one test call without a case.
