Crack in Body - is it still water proof?

[BrigitteB1]

Hello!

I don't have a Sony Store near me. But I have a hairline crack in the body of my Xperia XZ. I initially bought this phone because it is water proof. 

I have attached some pictures of the crack. It's by the power button. It's a very small crack, I only noticed it recently when I removed my case.

If it is no longer water resistant, how can I go about finding my warranty? I used to be able to find it under a menu on my phone, but for some reason I cannot find that any longer, and I've lost my receipt. I had 10 months warranty and it's been a maximum of 6 months since I got this phone.

Thank you for your help in advance!

Here are the pictures:

Regards,

Brigitte

[halogenic_sky]

settings > system > about phone > support > information (the last choice is on the bottom of the screen, third option from the left) 

p.s. there used to be a diagnostic check which measured the internal pressure of the phone - you simply applied gentle pressure to the screen to ascertain whether the water resistance had been compromised.....