Enable . (If this option is missing, you may need to connect to Wi-Fi and wait for the phone to check for updates).

Team Win Recovery Project, commonly known as TWRP, is the gold standard for custom recovery in the Android world. Installing TWRP on your Samsung Galaxy J2 Core (SM-J260) opens up a world of possibilities, from flashing custom ROMs to gaining root access. This comprehensive guide covers everything you need to know about getting TWRP up and running on your device. Why Install TWRP on Galaxy J2 Core?

Since you disabled Auto Reboot, your phone is still in Download Mode. Hold to exit Download Mode.

Put your J2 Core into : Power off, then hold Volume Down + Power + Home (or Volume Down + Volume Up while plugging in USB, depending on the specific regional variant).

A warning screen will appear. Long press to enter device unlock mode. Confirm the unlock. Your device will wipe and reboot.

Create "Nandroid" backups of your entire system.

This guide is specifically for the Samsung Galaxy J2 Core (SM-J260 variants).

Download the correct TWRP .tar file for the SM-J260. Phase 2: Unlocking the Bootloader