Step one: Unlock the bootloader. The video warned this would wipe everything. He held his breath, navigated the secret Developer Options menu, and toggled the switch. The phone rebooted into a strange, stark screen. "Warning: Custom OS can cause critical problems." He pressed Volume Up. The phone erased itself. Photos of his mother's birthday. A voice note from his late grandfather. All gone. He didn't cry. He couldn't afford to.
by AndroidDeveloperSB (XDA thread: “TWRP for J2 Core (j2corelte)”). Features: twrp samsung j2 core best
There’s for the J2 Core, but the community has delivered reliable unofficial builds. The best-maintained version is by GDGVTS (based on TWRP 3.3.1–3.7.0). Look for builds tagged twrp_j2corelte — they support: Disclaimer: Step one: Unlock the bootloader
Unlike newer Samsung phones, the J2 Core has a simple unlock process. In Odin, click AP (or PDA) and select the TWRP