Cause:

• Since the position of the phone's side buttons (including the fingerprint sensor button) is assembled by using multiple components, there are differences in the sound and elasticity generated.
• The sound is caused by the movements of the steel sheet when a button is being pressed.

Solution:

• This is normal and no troubleshooting is required.
• If this issue affects your ability to use your phone normally, back up your data and take your phone and proof of purchase to an authorised Huawei Customer Service Centre for assistance.