How do i fix It?

[heavencutiexd21]

I reset my phone and i accidentally hold the power button and then the system crashed por something and i cant use bluetooth and some apps that came with the phone is gone like calendar,clock,themes and more is there something i can do to fix It? Btw my phone is Huawei p9 lite

 

[falcryx]

This issue had occurred to my previous Huawei phone, my only suggestion for you is either to call the Huawei support online or visit the nearest Huawei service center. If there is any software issues, they may be the ones who could help restore the OS for you.