Is it possible to set a screen lock without his mobile phone?

Me
- in P series
3

I have the following problem: My phone does not turn on anymore because the file was not found when installing a software update. I have a demo model from the Huawei P8. However, my uncle works with cell phones and now my dad wants to bring the phone to him because he can update it (I have no idea how it works). I have no screen lock on my phone because I always have it with me. (I have the phone only transitional because my old scrap is). By the way, the Huawei belongs to my dad and he wants it to work if he gets it back so I can't say he's bringing it to my uncle. Now my question is if I could somehow manage to get a screen lock, as my family would generally like to snoop on my phone and I honestly do not want my gallery or whatsapp chats to be read. On my phone there are some pictures and messages that could prove to my parents that I consume illegal drugs from time to time. Or can it also be possible that all apps and pictures are gone after the update?

I really do not know what to do, and I'm sorry if the question is funny put I have really little idea of cell phones.

an

If the phone does not start and is completely reinstalled, the screen lock is of no use to you, because the complete software is then reinstalled!

But then all your data is gone!

Me

Okay, so if I press the button then this Huawei logo is there which is always there at startup, but it always stays there until the screen goes dark again (maybe because the battery is empty). My brother has already opened some menu with which you can reset the phone but there's only the sentence "Update install failed: Package not found"

that the data are all gone is not bad I'm just glad that there can't be rumgeschnüffelt there, Thank you

Al

Your parents do not need your cell phone to look at your photos. You can see that on the computer if you wish.