The back shell of the Redmi Note 13 Pro vibrates when playing music at high volume

To improve the audio experience of the speakers, Redmi Note 13 Pro comes with dual speakers. Due to the structural characteristic, the entire back shell of the phone serves as the speaker resonance chamber, which inevitably brings vibration in some areas of the back shell, especially when the speaker plays audio files at high volume.
Xiaomi smartphones undergo strict professional inspection before leaving the factory. The vibration is a normal phenomenon and will not cause any damage to the performance of the phone. Please feel free to use it. You can also wear an official phone case to relieve the vibration feeling.