You need to unlock bootloader first. My previous phone was same model like yours and was rooted successfully. Be aware that during bootloader unlocking process your phone will be wiped, so backup your data first.
Thanks for your reply!!!!
So, as far as I know, according to this thread, all I need to do is:
fastboot flash boot boot.img
Also, TWRP is optional, right? ... I just want to keep using the same stock room.
Probllem is boot.img link is broken for E2306.
I dont want to risk using another boot.img ... Does anyone have boot.img for E2306?
More info:
1- I do have "Enable OEM Unlock" active.
2- In "Rooting status" I have: «Bootloader unlock allowed: No»