Facebook Messenger Mic Test & “Microphone Not Working” Fix

Step 1: Does your mic work at all?

Click Test my microphone above and speak:

• The bar moves here — your mic and drivers are fine; the problem is in your Facebook Messenger settings. Go to Facebook Messenger audio settings.
• The bar does not move here — the issue is system-level (permission, device or driver), not Facebook Messenger. See System-level fixes.

Step 2: Fix Facebook Messenger audio settings

Open phone Settings → Apps → Messenger → Permissions, or the browser mic icon, then:

1. Allow the mic. Browser: click the mic icon in the address bar → Allow, then reload. Phone: enable Microphone for Messenger in app permissions.
2. Re-start the call. End and re-place the call so Messenger re-requests the mic.
3. Unmute. Tap the screen and confirm the mic button is not crossed out.
4. Pick the right input. On desktop, set the correct device in your OS Sound settings (see below).

Facebook Messenger-specific gotchas worth checking

Messenger exists as a browser app (messenger.com or inside Facebook) and as phone/desktop apps, each with its own permission. In the browser, calls use the site microphone permission — click the mic icon in the address bar, allow, and reload. On the phone, Messenger only prompts for the Microphone permission on the first call; if you denied it, re-enable it under the app's permissions and re-place the call.

Voice and video calls increasingly run on Messenger's end-to-end-encrypted calling, which renegotiates devices when the call starts — changing your mic mid-call will not take effect until you hang up and call again. The same Microphone permission gates voice clips, so a non-working record button points to the permission, not the hardware.

Step 3: System-level fixes (if the test above also failed)

If the volume bar did not move in the test, the problem is your device or OS, not Facebook Messenger. Fix it here, then retest.

Windows 10 / 11

1. Settings → Privacy & security → Microphone: enable Microphone access and allow desktop apps (and your browser).
2. Settings → System → Sound → Input: select the correct device and confirm the meter moves.
3. Right-click the speaker icon → Sound settings → Recording: set your mic as the Default device and enable it.
4. Close other apps holding the mic (Zoom, Teams, Discord, OBS) and restart Facebook Messenger.

macOS

1. System Settings → Privacy & Security → Microphone: enable Facebook Messenger (or your browser), then quit (Cmd+Q) and reopen — macOS only applies the permission after a restart.
2. System Settings → Sound → Input: choose the right device and check the level.

Facebook Messenger in the browser (web client)

If you joined Facebook Messenger from a browser, click the mic icon in the address bar, choose Allow, and reload. The web client uses the same browser microphone permission as the test on this page.

Facebook Messenger on phone (iOS / Android)

Open your phone Settings and enable the Microphone permission for Facebook Messenger, then reopen the app and rejoin. In the call, tap the screen and confirm you are not muted.

Step 4: Last resorts

• Update Facebook Messenger to the latest version (older builds have audio device bugs).
• Update or reinstall your audio/headset driver and reboot.
• Sign out and back in, or do a clean reinstall of Facebook Messenger.
• On a USB headset, try a different port and confirm it is selected as both the microphone and speaker.

FAQ