Originally Posted by maulich
Check return to stock threads.....you will need to use that process.
Oh thank you very much. But checking some of those threads, what if I don't know the exact region of my phone? (I bought it from Amazon and I think that the seller sells different regions) I mean I think that when I first booted it it had a chinese virtual keyboard, but I don't have the box anymore.
Do I necessarily have to select the firmware for the correct region to make it work? And if so, could I just try with a bunch of them until I hit the right one?
I just realized that method requires entering to the download mode. I can't enter to the download mode, it takes me to the TWRP menu.