iPhone Microphone Not Working: Top Fixes

If your iPhone’s microphone has stopped picking up sound during calls, voice memos, or Siri requests, the fix is often a simple settings change, a cleaning, or an app permission toggle—not a trip to the repair shop. This guide walks through the most effective solutions in order, from quick software checks to hardware cleaning, so you can restore clear audio quickly.

Why Your iPhone Microphone Stops Working

The iPhone actually has multiple microphones: one at the bottom near the charging port, one on the front (in the TrueDepth camera for Face ID), and one on the back near the camera module. Each serves a different purpose—the bottom mic handles calls and voice memos, the front mic is for speakerphone and video calls, and the back mic helps with video recording and noise cancellation. When you report a “microphone not working,” the problem may be isolated to just one of these, which gives a clue about the cause.

Common culprits include debris or lint blocking the tiny mesh openings, a Bluetooth device that’s still connected and rerouting audio, a software glitch that freezes the audio driver, or an app permission that was accidentally revoked. Less often, it’s a hardware failure after a drop or water exposure. Because the causes vary, the fixes below are arranged from the least invasive to the most involved.

Quick Fixes to Try First

Before digging into settings, try these two steps—they resolve a surprising number of cases.

Restart your iPhone. Press and hold the side button and either volume button until the power off slider appears, then slide to power off. Wait 30 seconds, then turn it back on. This clears temporary audio driver glitches.
Check for connected Bluetooth devices. Open Control Center (swipe down from the top-right on Face ID models, or up from the bottom on older ones) and tap the Bluetooth icon to turn it off. Then test the mic. If it works, your iPhone was sending audio to a headset or speaker you forgot about. Turn Bluetooth back on and disconnect the specific device instead.

If those don’t help, move on to the more targeted fixes below.

Check Microphone Permissions for Apps

iOS requires each app to ask permission before using the microphone. If you previously tapped “Don’t Allow” for an app, it will silently fail to record audio until you re-enable it. This is a common cause for apps like WhatsApp, Instagram, or voice recorders.

Open Settings and scroll to the specific app that’s having mic issues.
Tap the app name and check if Microphone is toggled on. If it’s off, turn it on.
If the app isn’t listed, go to Settings > Privacy & Security > Microphone. You’ll see a list of all apps that have requested access. Toggle on the ones you need.

After changing the permission, fully close the app (swipe up from the bottom and pause, then swipe the app away) and reopen it. The mic should now work.

Clean the Microphone Openings

Dust, pocket lint, and even dried gunk can block the tiny mesh holes at the bottom of your iPhone or on the front earpiece. This is especially common if you keep your phone in a pocket without a case. A blocked bottom mic will make your voice sound muffled or absent to callers, while a blocked front mic affects speakerphone and video calls.

To clean safely:

Use a soft-bristled brush (like a clean, dry toothbrush) to gently sweep across the mic openings. Do not poke anything inside—you can damage the internal membrane.
If you see visible debris, use a wooden toothpick or a SIM eject tool to very gently scrape the surface of the mesh. Avoid metal objects that could scratch or puncture.
Do not use compressed air, as it can force debris deeper or damage the seal.

After cleaning, test the mic with Voice Memos. If the waveform shows no activity, the blockage may be internal, and the next steps are needed.

Test Each Microphone and Use Diagnostics

To isolate which mic is failing, use the built-in Voice Memos app and the camera:

Bottom mic: Open Voice Memos and record a short clip. Play it back—if it’s silent or muffled, the bottom mic is the problem.
Front mic: Open the Camera app, switch to the front (selfie) camera, and record a video while speaking. If the audio is missing, the front mic is the issue.
Back mic: Switch to the rear camera and record a video. This uses the back mic.
Noise cancellation: During a call, the back mic helps cancel background noise. If callers hear you fine but complain about background noise, it may be this one.

If only one mic fails, it’s more likely a hardware issue (like a drop or water damage) than a software glitch. If all mics fail, the problem is probably software-related or a single shared component.

Update iOS and Reset Settings

Software bugs can occasionally break audio input. Apple regularly patches such issues in iOS updates. Go to Settings > General > Software Update and install any available update. If you’re already up to date, try resetting all settings—this doesn’t erase your data but restores default preferences like Wi-Fi, Bluetooth, and privacy permissions.

Go to Settings > General > Transfer or Reset iPhone > Reset.
Choose Reset All Settings. Enter your passcode and confirm.

After the phone restarts, you’ll need to re-enter Wi-Fi passwords and re-grant microphone permissions to apps. Test the mic again. If it works, you can narrow the cause to a misconfigured setting.

When to Seek Professional Repair

If you’ve tried all the above and the microphone still doesn’t work, it’s likely a hardware failure. This can happen after a drop, exposure to moisture, or simply wear over time. Symptoms of hardware failure include:

The mic never works, even in Voice Memos and after a restart.
Only one specific mic is dead (e.g., bottom mic works, front mic doesn’t).
You see a warning like “Cannot detect microphone” when using an app.

In that case, contact Apple Support or visit an Apple Store or authorized service provider. They can run a diagnostic and replace the faulty component. If your iPhone is under warranty or AppleCare+, the repair may be covered. If not, you’ll get a cost estimate before any work is done. Avoid third-party repairs that might void your warranty or use non-genuine parts.

Frequently Asked Questions

Why can people hear me but I can’t hear them?

That’s a speaker issue, not a microphone issue. The microphone is for capturing your voice, so if others can hear you but you can’t hear them, the problem is with the earpiece or speaker. Check the volume during a call and ensure nothing is blocking the top speaker. If the speaker is damaged, you’ll need a repair.

My microphone works in Voice Memos but not in calls. Why?

This usually points to a Bluetooth device being connected, or the call audio being routed to a different mic. Check Control Center to see if audio is going to a Bluetooth headset. Also, try toggling the speakerphone on and off during a call—this switches between the front and bottom mics. If that doesn’t help, reset network settings (Settings > General > Transfer or Reset > Reset > Reset Network Settings) to clear any call routing glitches.

Does a screen protector affect the microphone?

Most screen protectors don’t cover the microphones, but a poorly fitted case might. The bottom mic is a small hole next to the charging port, and the front mic is in the earpiece. If your case has a cutout that’s misaligned, it can block the mic. Remove the case and test—if it works, the case is the culprit.

Can water damage cause the microphone to stop working?

Yes. Even though modern iPhones are water-resistant, water can still corrode the internal mic components over time. If your phone was exposed to water and the mic stopped working, it’s likely water damage. Put the phone in a dry area with airflow for 24-48 hours and test again. If it doesn’t recover, professional repair is needed.

Will a factory reset fix a microphone that stopped working after an iOS update?

Possibly, but a full factory reset (Settings > General > Transfer or Reset > Erase All Content and Settings) should be a last resort after trying “Reset All Settings” and updating iOS. It wipes all data, so back up first. If a software bug is causing the issue, a clean install can fix it. If the mic still fails after a factory reset, it’s hardware.

General steps for current mainstream versions; menus can differ by device and version. See the disclaimer or report an error.

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