Pradėti reikia nuo kešo valymo, jei nepadės, valyti visą particiją:
How to fix Huawei P9 Bluetooth issues:

  1.. Turn on the Huawei P9
  2.. Go to home screen and select the app icon
  3.. Then select on the settings icon
  4.. Browse for the Application Manager
  5.. Display All Tabs by swiping either right or left
  6.. Select on Bluetooth
  7.. Select to stop it forcefully.
  8.. Now clear the cache
  9.. Select clear the Bluetooth data
  10.. Select Ok
  11.. Finally restart the Huawei P9
How to fix Huawei P9 Bluetooth issues:

If the steps above don’t work, try putting your Huawei P9 into recovery mode and wipe cache partition. After that, try to connect the Huawei P9 with another Bluetooth device in range and it should work. These instructions should be able to solve any Bluetooth problems you have on your Huawei P9.