If the physical buttons on your phone do not respond properly when you press them, you need to apply more force for the button to respond, or the button does not go back to its original height, refer to the following:

1. If a cover is in use, remove it and see if this resolves the issue.
2. The physical buttons may be damaged if the phone is dropped or liquid enters the phone. If this is the case, back up your data and take your device and proof of purchase to an authorised Huawei Customer Service Centre for assistance.