Except from these problems if you just want to restart your smartphone in a correct way, you can choose Huawei P9 Lite soft reset. Huawei P9 Lite Restart a Frozen or Unresponsive Huawei P9 Lite
1. Turn Off Your Phone Hold the Power button and choose the Power Off option that appears on the screen, then hit OK to confirm. 2. Wait for a While Press the Power button after a few seconds and
Last night the phone started to restart by itself again, but this time after it turned on completely it went off some minutes later and started to restart several times without reason, I got frustrated so I decided to uninstall root (thought it was the problem) but the problem was still there, turn on and after some minutes it went off and restart. Why Huawei P9 lite cameras suddenly stop working or display errors like this? There may be a thousand causes for this Android camera problem. Those can vary from hardware malfunctions to software conflicts on your Huawei P9 lite device.
if Your phone brick because software can contact Us for service unbrick via Uploade mode/Fastboot mode or TestpointGiải Pháp Android - Android Solution Vietn
Problem case: Huawei P9 lite VNS-L31 on B380 Bootloader unlocked. FRP Locked. Fastboot commands fail with except andfastboot devices Solution: Have ready your Unlock bootloader code from Huawei Factory Reset your device. Reboot to fastboot ,in fastboot you should see: Phone: unlocked FRP: locked . 414 821 342 220 843 318 104 363

huawei p9 lite restart problem