Lingo - Fix No Sound – Avantree Support

Before You Start: No sound may mean the Lingo N21 is not connected to your device, audio is playing through a different output, or the volume is too low.

Step 1 – Check the Bluetooth Connection

Check that Lingo N21 is connected in your phone, tablet, or computer’s Bluetooth settings.

Solid Blue – Connected.

Flashing Red and Blue – Bluetooth pairing mode.

If Lingo N21 is not connected:

Turn the headset off.
Press and hold the MFB / Power button for 5 seconds. Keep holding after it turns on, until the LED flashes red and blue.
Open your device’s Bluetooth settings, select Lingo N21, and wait for it to connect. The LED should turn solid blue.

Lingo N21 Bluetooth Pairing Help →

Just charged the headset? Remove it from the charging dock and turn it on manually. It should reconnect to the last paired device.

Step 2 – Check the Audio Output and Volume

Play audio and make sure your device is sending sound to Lingo N21. Turn up the volume on both the device and headset.

Computer or Calling App

In your computer’s sound settings, select Avantalk Lingo N21 as the speaker/output.
For calls or meetings, select Avantalk Lingo N21 as both the speaker and microphone in the app’s audio settings.
If you see Stereo and Hands-Free, choose Hands-Free for calls.

Phone or Tablet

Check Bluetooth settings and confirm Lingo N21 is connected.
During a call, tap the phone’s audio/Bluetooth option and select Lingo N21.

Set Up Lingo N21 for Calls and Meetings →

Step 3 – Reconnect and Test Again

Turn Bluetooth off on nearby devices that have connected to Lingo N21 before. Then reconnect it to the device you want to use.
If Lingo N21 appears in Bluetooth settings but will not connect, select Forget / Remove / Unpair. Put the headset in pairing mode and select Lingo N21 again.
Try playing audio from another app or device.
If there is no LED light and the headset will not turn on, charge it and try again.

Still No Sound?

Tell us your phone, tablet, or computer model, whether Lingo N21 appears connected in Bluetooth settings, and which apps have no sound.

Contact Avantree Support →