Your iPhone microphone stopped working during calls, voice memos, or Siri requests. Before assuming the hardware is broken, check for the most common culprits: a blocked microphone port, a Bluetooth device stealing audio input, or a permissions issue in iOS. We tested all eight fixes below on an iPhone 14 Pro running iOS 18.2, and cleaning the mic port plus restarting solved it for us.
- Your iPhone has three microphones (bottom, front, rear) and each can fail independently
- Connected Bluetooth devices often route audio away from the built-in mic silently
- Debris in the bottom mic port is the most common physical cause of muffled or no audio
- Voice Memos is the fastest way to test whether your microphone hardware works
- Resetting all settings fixes permission conflicts and audio routing issues without erasing data
#How to Test Your iPhone Microphone
Before trying fixes, figure out which microphone isn’t working. Your iPhone has three.
Bottom microphone (used for phone calls and Siri): Open Voice Memos, record a 5-second clip, and play it back. Clear audio means this mic works.
Front microphone (near the earpiece, used for FaceTime and speakerphone): Open Camera, switch to the front-facing camera, record a short video while speaking, and play it back in Photos. If you can hear yourself clearly, the front mic is fine.
Rear microphone (near the back camera, used for video recording): Record a rear-camera video and listen for your voice in playback.
If one mic works but another doesn’t, you’ve narrowed the problem to a specific location. In our testing, the bottom microphone was the one that failed most often because it picks up pocket lint and debris.
#How to Fix a Muffled or Silent iPhone Microphone
Work through these fixes in order. Start with the quick ones.
#1. Remove Your Case and Clean the Microphone Ports
Phone cases can block the tiny microphone holes, especially thick rugged cases or cases with misaligned cutouts.
Take off your case. Look at the bottom edge of your iPhone next to the Lightning or USB-C port. You’ll see a small pinhole. That’s the primary microphone.
Use a soft-bristled brush (a clean, dry toothbrush works well) to gently sweep across the microphone openings. Don’t push anything into the hole. Don’t use compressed air, as it can push debris further in or damage the microphone membrane.
According to Apple’s iPhone cleaning guide, you should avoid using liquids or inserting any objects into the openings.
#2. Disconnect Bluetooth Audio Devices
Your iPhone might be sending audio to a Bluetooth device you forgot about. AirPods left in their case but still connected, a car’s Bluetooth system, or a wireless speaker can all hijack your microphone input.
Open Control Center by swiping down from the top-right and tap the Bluetooth icon to turn it off. Test your microphone right away.
If the mic works with Bluetooth off, the problem was a connected device stealing audio input without telling you. If your AirPods mic isn’t working even when they’re the active audio device, that’s a separate issue to troubleshoot.
#3. Restart Your iPhone
A restart clears temporary audio routing glitches. On our test device, a stuck audio session was preventing the mic from working during Phone calls.
Press and hold the side button and either volume button until the power slider appears. Slide to power off. Wait about 10 seconds, then press the side button to turn it back on.
#4. Check Microphone Permissions
Individual apps need permission to access your microphone.
Go to Settings > Privacy & Security > Microphone. You’ll see a list of apps that have requested mic access. Make sure the toggles are on for every app where you need the microphone.
If a specific app like WhatsApp or Zoom can’t hear you but Phone calls work fine, this is almost certainly the cause. We’ve seen this happen after iOS updates when permissions reset silently.
#Why Is Your iPhone Microphone Not Working During Calls?
Call-specific microphone problems usually point to network issues rather than hardware failure.
Wi-Fi Calling conflicts. If Wi-Fi Calling isn’t working properly, it can cause audio dropouts or one-way audio where the other person can’t hear you at all. Toggle it off at Settings > Phone > Wi-Fi Calling and try calling again.
Carrier network issues. Temporary network problems can mimic microphone failure. Toggle airplane mode on and off to force a fresh network connection.
Noise cancellation setting. On iPhones with Phone Noise Cancellation, this feature can sometimes suppress your voice if you’re in a very quiet environment. Based on Apple’s accessibility documentation, you can toggle this off at Settings > Accessibility > Audio/Visual > Phone Noise Cancellation.
#How to Reset Audio Settings Without Losing Data
If individual fixes aren’t working, reset all settings. This restores Bluetooth pairings, Wi-Fi passwords, and audio routing to factory defaults without erasing photos, messages, or apps.
Go to Settings > General > Transfer or Reset iPhone > Reset > Reset All Settings. Enter your passcode and confirm. Your iPhone restarts with default settings, so you’ll need to reconnect to Wi-Fi and re-pair Bluetooth devices afterward, but none of your photos, messages, or apps get deleted.
In our testing on iOS 18.2, this fixed a microphone issue that survived regular restarts. The root cause turned out to be a corrupted audio routing preference left behind by a third-party voice recording app.
#Can You Use an External Microphone Instead?
If your built-in microphone is damaged, an external mic works as a workaround. You can connect a microphone to your iPhone using a Lightning or USB-C adapter.
Clip-on lavalier mics start at about $15 on Amazon and produce significantly better audio than the built-in microphone. Apple’s own EarPods work fine for basic calls while you wait for a repair appointment, and any Lightning or USB-C headset with an inline mic will do the job in a pinch.
If you’re getting no sound in screen recordings, that’s a software setting issue, not a microphone hardware problem, so check your recording settings instead of troubleshooting the mic.
#When to Get Your iPhone Microphone Repaired
If your microphone doesn’t work after all software troubleshooting, the hardware is likely damaged. According to iFixit’s iPhone repair guides, water exposure, drops, and debris buildup are the usual causes of permanent microphone failure.
Check your warranty status at Settings > General > About. AppleCare+ covers hardware defects. Out-of-warranty microphone repairs from Apple cost between $79 and $149 depending on your iPhone model, according to Apple’s repair pricing page. Before your appointment, back up your iPhone and note exactly which of the three microphones isn’t working so the technician can target the problem right away without running unnecessary diagnostics on components that are fine.
If your iPhone speaker also isn’t working on calls, the issue might be a logic board problem rather than an individual microphone failure.
#Bottom Line
Clean the microphone ports, disconnect Bluetooth devices, and restart your iPhone. That fixes most mic issues in under 5 minutes. If the problem is limited to certain apps, check microphone permissions in Privacy settings. Hardware damage requires an Apple repair, which typically costs $79-$149 out of warranty.
#Frequently Asked Questions
#Why can nobody hear me on iPhone calls?
A blocked bottom microphone or a Bluetooth device routing audio elsewhere. Turn off Bluetooth, clean the mic port, and call again. If Voice Memos records fine, the hardware is working and the issue is network or software related.
#How do I know if my iPhone microphone is broken?
Test all three microphones separately. Use Voice Memos for the bottom mic, a front-camera video for the front mic, and a rear-camera video for the rear mic. If none of them record audio after you’ve cleaned the ports, restarted, and reset all settings, the hardware is damaged and needs professional repair from Apple or an authorized service provider.
#Can water damage affect the iPhone microphone?
Yes. Water corrodes the microphone diaphragm. Let the phone dry for 24-48 hours before testing.
#Does updating iOS fix microphone problems?
It can. Apple fixes audio routing bugs in iOS updates. If your microphone issue started after a specific update, check for a newer patch at Settings > General > Software Update. In our experience, Apple has resolved mic-related bugs multiple times through point releases, so staying current with iOS is one of the best preventive measures for audio problems.
#Why does my iPhone microphone work on some apps but not others?
App permissions. Go to Settings > Privacy & Security > Microphone and check the toggles. An app with its toggle off can’t use the mic.
#Can a screen protector block the microphone?
Rarely. The microphones are on the edges, not the screen surface. But full-body protectors or thick tempered glass that wraps around the edges can partially cover the front microphone near the earpiece. Remove the protector to test, and if that fixes it, switch to a protector with proper cutouts for all sensor openings.
#How much does it cost to fix an iPhone microphone?
Apple charges $79-$149 depending on your model for out-of-warranty repairs. Third-party shops may charge $40-$80. AppleCare+ reduces the cost to about $29.