Samsung j120f new version root and unlock done with z3x tool
Samsung j1 2016-j120f root file tested to perform unlock operation in new security builds..Custom Recovery Twrp 3.0.2-0 For Phone Samsung Galaxy j1 (2016) model: SM-J120F.with this file root is successful with all version of j120f..
Download twrp recovery for Samsung j120f
Downlaod super su for j120f
Downlaod samsung android usb drivers if u dont have
Download odin tool to flash twrp in download mode
Make sure that you have enable oem unlock and usb debugging option before perform operation..
You Can Use TWRP Recovery Without ROOT Your Phone For Backup and Restore Or Wipe All Phone Data,Flash zip file,file manager..
Note-To boot into twrp recovery first time,you have to reboot phone into force recovery mode (press both volume+home+power key and quickly release only volume down key after power off phone ) then flash super su using twrp recovery..
After successful root you can perform unlock opration with z3x samsung pro tool to unlock Samsung j120f new build..
..BEST OF LUCK..