Solution:
Please pay attention to the location where the phone makes a sound when shaking the phone. This is a normal phenomenon if the sound occurs in the following places.
1. Buttons or SIM card slot
There is a small gap inside the phone's body to realize the button feel and the SIM card slot installation function.
2. Camera
If the sound is loud or there are other issues when shaking the phone, it is recommended that you go to the realme customer service center for inspection.