Android Microphone Not Working? 6 Fixes

Nobody can hear you on calls, but your voice notes record clearly. That split is information, not mystery. Your phone uses more than one microphone, and different apps reach different inputs. If the microphone works anywhere, something took it elsewhere.

I ran every software step below on my Tecno Spark 40. Samsung and Google paths are documented rather than device-tested. Nothing here asks you to open the phone, and nothing prescribes a factory reset.

Which silent: one app, everywhere, or calls only

Find your row, then go to the section it names.

What you hear	Which layer it implicates	Start at
Dead on calls, alive on speakerphone or video	The primary bottom mic is blocked or dead	The physical third, then the hardware verdict
Dead everywhere, including Voice Recorder	The system-wide toggle, or hardware across all inputs	Permissions plus the privacy toggle
Dead in one app only	That app lost permission, or another app holds it	Permissions, then the hog hunt
Dead right after a system update	The update reset the toggle or a permission state	Permissions plus the privacy toggle

Samsung’s support names the primary microphone at the bottom of the device, and Hollyland’s fixes guide adds the software half: calls and recordings use different profiles, routed to different inputs. Samsung’s troubleshooting page confirms the hardware half.

Two corrections save a week. A weak network degrades the call, but it never stops capture: a clean Recorder clip on airplane mode clears the network. Volume controls what you hear, never what the other side hears. For the wider field, start with our Android problems fix guide.

The 60-second three-app test

Three tests rule each layer in or out. Hollyland opens the same way, and I add how to read each result.

Test	What it proves	How you read it
Call on speakerphone, speak normally	Whether the secondary input and call path work	Pass means the phone captures audio; the fault is the primary input or one app
Record a clip in Voice Recorder, watch the meter	Whether any input captures at system level	A moving meter means software diverted the mic; a flat meter means toggle or hardware
Send yourself a WhatsApp voice note	Whether a third party app holds permission and a route	Pass with Recorder failing means that app’s permission differs

Any pass sends you to the software sections. Even with total failure, check the privacy toggle first. The built-in Recorder beats every browser test page. Our how to test Android guide covers the same isolate first habit.

Permissions plus the privacy toggle

A missing permission is the most common software cause. Open Settings > Apps > WhatsApp > Permissions and grant the microphone, the path WhatsApp’s own help page documents. The ladder serves every app: Settings > Apps, choose the app, tap Permissions, then Microphone. Android Authority’s guide adds the precision: choose Allow only while using the app.

A grant that changes nothing needs a reset. Revoke the permission, force stop the app, relaunch, and grant again. Hollyland documents this revoke cycle for states that survive updates. You retest in Recorder after each change.

Then check the switch that mutes the microphone everywhere. Android 12 and later carry one system-wide control, and Google’s own help page shows two doors: Settings > Privacy > Microphone access, or the Mic access tile in Quick Settings. Swipe down twice for the full panel. Updates reset this toggle silently.

The hog hunt: green dot to dashboard to evict

Android shows a green indicator at the top right whenever an app actively uses the microphone. Google documents the tap through: swipe down, tap once to name the app, tap again for its permission controls.

The dot only helps if you catch it live. Android Police’s explainer fills the gap with the Privacy Dashboard timeline: Settings > Security and privacy > Privacy dashboard, choose Microphone, and read which apps accessed it and when. You revoke the hog or close it. Call recorders, screen recorders, and background assistants are Hollyland’s repeat culprits, so recent installs in those classes go first.

Routes that steal the microphone: Bluetooth, headsets, Wi-Fi calling

A connected earbud moves the input off the phone. Open Settings > Bluetooth, tap Disconnect, then retest the built-in microphone. A half-inserted wired plug does the same to a faulty headset mic. You pull every wired accessory first.

A stuck headset icon steals the route in software. If the symbol persists after unplugging, Android still routes to a headset that is gone. Carlcare’s guide keeps one useful trick: reseat the plug firmly, then remove it to clear the state. Samsung’s Africa support page adds Wi-Fi Calling off and the Mute all sounds switch under Accessibility > Hearing enhancements. Both paths are Samsung documented rather than Spark 40 tested.

Lint, case, water: the physical third

The bottom hole sits beside the charging port, and lint compacts inside it. Remove the case, shine a light in, and retest Recorder before cleaning.

Tool	Verdict	Authority
Dry soft brush or soft dry toothbrush	Use gently, then retest	Hollyland and Samsung agree on gentle dry cleaning
Wooden toothpick	Gentle only, never forced	Android Authority lists it with a puncture warning
Metal pin, paperclip, SIM ejector, broom stick	Never inside the hole	Metal risks the grille and membrane
Compressed air can	Never	Samsung and Android Authority forbid it

My verdict: soft brush or wooden toothpick gently, never metal, never air. Test case off, then case on, and keep the state the meter confirms. For water, Samsung’s rule stands: pat dry with a soft cloth, then air dry. If the phone also runs hot, our overheating guide covers that fault.

Safe Mode plus the hardware verdict

Safe Mode loads only the shipped software. Samsung documents the entry: hold Power off until the Safe Mode prompt appears, tap it, then test Recorder inside. A working mic there convicts a downloaded app, and you uninstall recent apps one by one with a retest after each. Uninstall call recorders and screen recorders first.

A mic dead in Safe Mode with the toggle on and the case off is a hardware verdict. Resetting app preferences under Settings > System > Reset options is Hollyland’s last software rung, and it keeps your files. This guide stops there. A confirmed dead mic needs a repair quote or a USB microphone workaround, both in future guides.

What I tested on a Tecno Spark 40, and what I could not reproduce

I walked the permission ladder, the privacy toggle, the green dot tap through, the dashboard timeline, and the Bluetooth disconnect on my Tecno Spark 40. The three-app test ran end to end: speakerphone connected, Recorder’s meter moved, and a WhatsApp note played back. HiOS labels vary by build, so you search Settings when a label differs.

I could not reproduce a truly dead microphone without breaking the device. The hardware verdict therefore rests on Samsung’s documented ladder, not a dead unit on my desk. Our Android problems fix guide carries the short version of this fault.

Questions readers ask

Works on speakerphone but not on calls: software or hardware?

That pattern points at the primary bottom microphone. Clean the hole gently, retest case off, and read Safe Mode survival as the hardware answer.

Which app is using my microphone right now?

Swipe down, tap the green dot once to name the app, and tap again for its controls. The dashboard timeline covers moments you missed.

Why did the microphone die right after the update?

Updates reset the system toggle and app permissions silently. Check Settings > Privacy > Microphone access first, then re-grant apps one by one.

Does the case really matter?

Yes. Test case off and replace any cover that shifts the meter.

Should I poke the hole with a pin?

No. Metal risks the grille and membrane, and Samsung forbids compressed air by name. A dry soft brush or wooden toothpick, used gently, is the limit.

Assistant cannot hear me, but calls work: same fault?

No. The assistant keeps its own permission and voice settings apart from the phone app. Check both before rerunning any section above.

Bottom line

A microphone that works anywhere is not broken. Test three apps, read the pattern, then evict the taker: permission, hog, toggle, route, lint, or case. Silence through Safe Mode with the toggle on means pricing a repair, not repeating steps. For the next fault, our Android problems fix guide holds the full ladder.