Download the root file kernel For root the Galaxy J4  SM-J400F

Model Number : SM-J400F

Android Version : Oreo  ( 8.0)

Description:

Extract the kernel placed in this post after download and Flash the file in the pda section in the odin software.

Warning:

This file is only for Galaxy J4 SM-J400F model, dont use this file for other models .if use it can damaged your device

J400F_8.0_U2_ ROOT_ Kernel

J400F_9.0_U3_ ROOT_ Kernel_Magisk

Odin3 v3.13.1