A malfunctioning microphone on an iPhone can render calls, voice memos, FaceTime, and Siri useless. Whether it’s a hardware issue, a software glitch, or an accessibility setting interfering with sound input, we’ve broken down every possible fix—step by step—to help you restore your iPhone microphone functionality.

How to Test Your iPhone Microphones Properly

Your iPhone has multiple microphones, and a full diagnosis requires testing each one:

✅ Test Methods by Microphone Location

Tip: Use the Voice Memos app to test the bottom mic. If you can’t hear your recording clearly, there’s an issue.

Clean the Microphone Openings

Dust, lint, or debris can clog the tiny microphone holes. Here’s how to clean them safely:

• Use a soft-bristled toothbrush
• Gently blow with compressed air (use short bursts)
• Avoid inserting pins or sharp objects

Check App Permissions for Microphone Access

Apps like Instagram, WhatsApp, or Zoom may not have microphone access enabled.

Steps:

1. Go to Settings > Privacy & Security > Microphone
2. Toggle ON the apps you want to grant access to

Restart and Force Reboot Your iPhone

Sometimes, a simple restart resolves temporary software bugs.

Soft Restart:
Hold the Power button and swipe to power off.

Force Reboot:

Update iOS to the Latest Version

Apple frequently releases bug fixes for hardware features like the microphone.

1. Go to Settings > General > Software Update
2. Install any available update

Disable Bluetooth to Avoid Routing Conflicts

Sometimes audio gets routed to a Bluetooth device that’s connected but out of range.

How to disable:

• Go to Settings > Bluetooth and toggle it OFF
• Or use Control Center > Bluetooth icon

Check Audio Routing Settings (Accessibility)

Accessibility settings can cause microphone input to behave unexpectedly.

1. Settings > Accessibility > Touch > Call Audio Routing
2. Ensure it’s set to Automatic (not Bluetooth Headset or Speaker)

Disable Noise Cancellation

Noise cancellation can interfere with microphone input during calls.

1. Settings > Accessibility > Audio/Visual
2. Toggle Phone Noise Cancellation to OFF

Reset All Settings Without Erasing Data

If the issue persists, try resetting all system settings:

1. Settings > General > Transfer or Reset iPhone > Reset > Reset All Settings

This won’t delete apps or data but will reset Wi-Fi, Bluetooth, and permissions.

Try Safe Mode or DFU Restore (Advanced Fix)

Sometimes deep firmware or app-level issues block microphone access.

Safe Mode Equivalent:

• Delete or offload recent apps that may use microphone permissions heavily

DFU Restore:

⚠️ Use this only if all else fails. This erases the device completely.

1. Connect iPhone to a computer
2. Enter DFU mode (varies by model)
3. Restore using Finder (Mac) or iTunes (Windows)

Hardware-Specific Microphone Fixes by iPhone Model

iPhone 14 / 13 / 12 Series

• Check magSafe accessories or cases blocking mic holes
• Update iOS regularly, as firmware bugs have affected voice memos and phone calls

iPhone 11 / XR / XS / X

• Camera app mic issues are common; test with third-party apps like Snapchat
• If only rear video has no sound, it’s likely the top mic (near camera)

iPhone 7 and 7 Plus

• Known hardware defect with audio IC chip — often needs logic board repair

iPhone 6s and Earlier

• Water damage and physical wear likely — test external microphones via headphone jack (if available)

When to Seek Professional Repair

If your microphone still isn’t working after all troubleshooting steps:

• Signs it’s hardware-related:
  • No mic input across all apps
  • Loudspeaker greyed out during calls
  • Mic works with headphones but not natively
• Options:
  • Book appointment with Apple Genius Bar
  • Visit certified repair center
  • Request mail-in repair

Final Tips Before Repair

• Backup your data via iCloud or iTunes
• Remove your case and clean the phone before handing it over
• Ask about microphone flex cable, audio IC, or logic board if out of warranty

Conclusion

A non-functional iPhone microphone can be caused by anything from a software setting to serious hardware failure. By following this comprehensive guide, you’ve covered every fixable angle. If the issue still persists, professional service is likely the only solution.

Stay proactive, update your iOS, and protect your device from physical damage for long-term performance.