anyway I just flashed the tot 16 GB firmware available and I choose to use for once the BOARD Dl option there. The device booted up into a test mode, I pick the All test choice and so I noticed something interesting.. the only voice that seems to fail is the TA wrong one.. it says Fail next to it.. I searched for this TA thing and it seems to be a Trim Auto partition, maybe where there are DRM stuff, proprietary things to make things harder for people wanting to root. but to be honest I never heard of it before ten minutes ago!
I also searched for this partition of the 16 GB partition available but I'm not sure there's one.. Still if it's true it's a partition!
Do you have any clue about that?
Also I would like to ask if to flash recent ROMs (Oreo / Pie) is mandatory to upgrade to stock Lollipop before or even KK would be good...
Thanks a lot guys, hope you could help, I feel bad for my G2, even if in the meantime I upgraded to new devices it's still my little one!