I rooted the system this afternoon using Ioroot25, and it seems like succeeded, coz I saw the supersu icon.
Then I installed the Autorac.app, which said to be working on all models, but later the admin told me not fitted for this D802T, I got really confused honestly. What's the difference between this D802T and international D802? Even installing firmware haven't seen any Australian version, for gods sake!
Anyway, I could get access to TWRP interface, and could go to download mode.
How should I bring the system back?
And plus, or maybe later, how to install TWRP on my G2? Just need that bloody 4K/120fps camera rom...
Really appreciate your help!!!