this twrp recovery works on J320M, J320F, J320FN
Start
phone in download mode (First shut down your device, then power on by
simultaneously pressing the power button, home button and volume down
key)
Run Odin and do as in the screenshot
after boot
copy supersu zip file to your phone and boot into recovery(restart it and keep volume up+ home button)
tap on install and flash supersu
you can change twrp language in settings(sixth button left to right)
caution: when you reboot from twrp it asks to install supersu- select (do not install) otherwise you'll get a bootloop and you'll have to flash downloaded supersu again)
Download_Odin,Twrp,Supersu
Password_nhn.lv@yahoo.com
Any Help,Call Me_+8801745666618
