If the other person cannot hear clearly or feels low volume during a call, perform the following steps.

 

• When you connect the earbuds to a computer, or make a voice call in a third-party app, the earbuds' microphones are not used to pick up your voice, and therefore the volume from the earbuds may be low. For guidance on how to use earbuds to record audio, see When will my HUAWEI FreeBuds/FreeLace series earbuds record my audio?
• FreeBuds Pro 4/FreeBuds Pro 3/FreeBuds Pro 2/FreeBuds Pro earbuds use bone voiceprint call noise cancellation technology to minimize ambient noise and make your voice sound clearer, but at a lower volume level. This is normal and does not indicate an issue with your device.

1. Switch the audio channels on your phone to the earbuds. After you connect your earbuds to your phone, you may have selected your phone as the calling device, mistakenly or not. In this case, the person you are calling will be unable to hear your voice when you talk to the earbuds.
   • During a call: On the call screen, change the audio output device to the connected earbuds, as shown below.
   

   • During media playback:
     • On phones running EMUI 10.0 or later: Swipe down from the top of the screen and select the connected earbuds as the audio output device in the Device connectivity section.
     • On phones running an EMUI version earlier than 10.0 or non-HUAWEI phones: Go to Settings > Bluetooth, then disconnect and re-connect the earbuds before playing audio again.
2. Make sure that your phone system and earbuds' firmware are updated to their latest versions.
3. Select the pair of ear tips that best fits your ears. If the call lasts for a long time, remember to adjust the position of the earbuds so that the sound pickup microphone at the bottom of the earbuds points towards your mouth.
    

   • For FreeArc/FreeBuds SE 3/FreeClip/FreeBuds SE 2/FreeBuds 5/FreeBuds Lipstick/FreeBuds 4E/FreeBuds 4/FreeBuds 3 earbuds, which do not include ear tips, adjust the earbuds to get the best possible fit.
   • If you are using FreeClip earbuds, make sure that the acoustic balls fit your auricles and the sound outlets face towards your ear canals, so that the microphone and bone conduction component can better pick up voice signals and provide better call quality.
   • If you are using FreeBuds Studio, adjust the width and ear cups to create a snug fit on your ears, for optimal sound quality and noise cancellation.
   • For FreeLace series earbuds, if you put the control panel on the right away from your mouth, like somewhere behind your ears, the person you are calling may experience low volume. Put the control panel near your mouth. If voice calls are not clear on the earbuds when you only wear one earbud, wear both earbuds for a better experience.
4. Make sure that the microphone and holes on the earbuds are not blocked by dirt or foreign objects. It is recommended that you clean the earbuds once a week. Use a clean and dry pointed cotton swab to gently remove the dirt and earwax from the meshes, and then use a soft cloth to clean the meshes. This is to prevent the meshes from being blocked by foreign objects, and ensure optimal sound quality.
5. Avoid making calls in poor signal environments.
6. Avoid making calls using the earbuds when there is noise or strong wind, or while you are cycling.
   

   There is a known compatibility issue with OPPO R11. If you make a call on an OPPO R11 wearing FreeBuds series earbuds, your voice may sound faint. Huawei is working to resolve this issue. You can also report the issue to the phone manufacturer by going to My OPPO App > Common Services > Feedback.

7. While both earbuds can receive audio from the other party during calls, only the primary earbud (the one first taken out of the case) is able to transmit audio. Make sure that you wear the primary earbud properly.

If you cannot hear clearly or feels the volume fluctuates during a call, perform the following steps.

1. Volume adjustment may not be synced between your device and the earbuds. Increase the volume on both your device and earbuds. For more information, see Use the earbuds or speaker to adjust the volume.
2. Select a pair of suitably-sized pair of ear tips and adjust the way you are wearing the earbuds to ensure that the earbuds fit well in ear canals, to isolate any external noise. Alternatively, enable the noise cancellation feature, if available on your earbuds.

3. Avoid making calls using the earbuds when there is noise or strong wind, or while you are cycling.
4. Make sure that the microphone and holes on the earbuds are not blocked by dirt or foreign objects. It is recommended that you clean the earbuds once a week. Use a clean and dry pointed cotton swab to gently remove the dirt and earwax from the meshes, and then use a soft cloth to clean the meshes. This is to prevent the meshes from being blocked by foreign objects, and ensure optimal sound quality.
5. If you are using FreeClip earbuds, make sure that the acoustic balls fit your auricles and the sound outlets face towards your ear canals, so that the earbuds can provide better call quality. Refer to here to learn more about how to wear your earbuds.
6. If you are using FreeArc earbuds, make sure that the acoustic beans fit in the cavum conchae of your ears (as shown in blue in the following figure) and the sound outlets face towards your ear canals, so that the earbuds can provide better call quality. Refer to here to learn more about how to wear your earbuds.