When playing music, check that the headset and the transmitting device are connected.
When using a video calling application on a PC, check that the headset and the PC are connected.
Depending on the video calling application you are using, microphone settings may not be available.
When you connect with 2 devices simultaneously with a multipoint connection, depending on the connected
device, the device may keep sending the silent signal even if the playback of the music or video is stopped. In
this case, the headset remains connected to the device, and the connection may not be changed to another
device. If the sound from the second device cannot be heard after the playback is stopped on the first device,
operate in the following order and check whether the situation has improved.
Stop the playback of the application on the first device.
Shut down the application on the first device.
Turn up the volume if it is too low.
Check that the connected device is playing back.
If you are connecting a PC to the headset, make sure the audio output setting of the PC is set for a Bluetooth
device.
Pair the headset and the Bluetooth device again.
Restart the smartphone or the PC you use.
Reset the headset.
Initialize the headset, and pair the headset and the device again.
Low sound levelLow sound level
Turn up the volume of the headset and the connected device.
Connect the Bluetooth device to the headset once again.
Reset the headset.
Initialize the headset, and pair the headset and the device again.
Low sound quality, or noise sound can be heardLow sound quality, or noise sound can be heard
Turn down the volume of the connected device if it is too loud.
Some devices that emit ultrasonic sound waves designed to repel rodents may occasionally be installed at the
entrances of commercial facilities or subway stations. Near such devices, the ultrasonic sound waves may
cause noise or unusual sounds to be heard from the headset. Leave the place where the noise or unusual sound
is heard. Or turn off the noise canceling mode from the Yealink USB Connect software.
If the headset connects to the previously connected Bluetooth device, the headset may only establish the
HFP/HSP Bluetooth connection when it is turned on. Use the connected device to connect via an A2DP
Bluetooth connection.
NOTENOTE
Depending on the connected device, the volume of the device and the headset may or may not be synced. If
the volume on a device is not synced to the volume on the headset, it will not be possible to use the device to
turn up the volume on the headset once the volume is turned down on the headset. In that case, turn up the
volume of both the headset and the connected device.
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