Samsung Galaxy J2 Core (2018) is a unique case in the custom recovery community because it is an Android Go

Hold down both the and Volume Down buttons simultaneously.

TWRP features useful on J2 Core

While the process requires patience—especially the step of unchecking "Auto Reboot" in Odin—the reward is complete control over your device. Whether you are looking to root for the first time or trying to bring new life into an older phone, TWRP for the Samsung J2 Core is the first and most crucial step.

: You allowed the phone to boot normally before entering TWRP for the first time. Repeat the Odin flashing process and ensure you switch directly from the forced reboot to the Volume Up + Power button combination.

Key concepts

If you successfully installed TWRP and want root access:

If you can tell me which variant of the Samsung J2 Core (e.g.,

If you want to customize your device further, I can provide instructions for your next steps. Share public link