Edited by cris3d3 at 2020-02-05 16:11
I'm using M792H and I've managed to obtain root only when I was logged-in my Meizu account on a China ROM (I think it was 7.0.0.0A but I'm not 100% sure). You will have to apply for the root code at mroot.flyme.cn (which you will have to write into that field).
The field with the Name of the device you want to root becomes available only if you are on a China ROM when apply for authorization (like in the attached screenshot).
I stayed like a week on China ROM before coming back to Global ROM and when I checked mroot app, the root button turned blue and finally obtain root function on Global 7.1.0.0G.

I really don't remember what phone number I provided, if it was a fake number or a real China number I found on a website

HI,

Yes I dit it las week and it works only an A version on my M792Q but you won't be able to obtain root permissions without a china phone number.... thank you Meizu dev !!! :-(
Make sur to do your entire backup before installing F8

Can I install Chinese firmware on M792H?