If the volume fluctuates when playing music through the speaker at a lower volume, this may be caused by the high dynamic range of the music source.When music is played at a higher volume, the audio amplifier limits the output amplitude in order to protect the speaker.Therefore, the high-pitched signal is lowered and the fluctuations are not very noticeable. If the volume is low, these fluctuations are more evident.

To solve this, try playing the same audio source in headset mode.If fluctuations also occur, this means that there is an issue with the audio source.

If fluctuations are not noticeable in headset mode, please back up your data and take your device and proof-of-purchase to an authorised HUAWEI Customer Service Centre or contact HUAWEI Customer Services for further assistance.