Note: If you let the phone boot normally into the system first, the stock recovery will overwrite TWRP, and you will have to flash it again. Post-Installation Steps Once in TWRP, you must often Format Data to remove encryption and prevent a bootloop. Go to Wipe > Format Data
Even with the best setup, issues happen. Here are the fixes. twrp samsung j2 core best
Without TWRP, the J2 Core is stuck on outdated Android 8.1 Go. With , you can: Note: If you let the phone boot normally