Release the buttons when a blue/green warning screen appears.
Alternative : TWRP 3.6.0 (unofficial by GRTWRP team) – less stable on some J260F variants.
To keep TWRP permanently, it is often recommended to flash a "No Verity Opt-Encrypt" zip or "Magisk" immediately after entering TWRP for the first time. Wipe > Format Data (type 'yes') to remove encryption.
Given the device’s 1GB RAM and 8GB storage, optimize TWRP like this:
The most stable way to install TWRP on a J2 Core is using the Odin tool : twrp samsung j2 core best
To install a custom ROM, you simply download the ROM file (e.g., ROM.zip ) and any Google Apps (GApps) package you want, transfer them to your phone, and use TWRP's button to flash them in order.
How to Install TWRP Recovery on Any Samsung Device (2026 Guide)
Samsung devices require the bootloader to be unlocked before accepting custom binaries. Open > System > About Phone .
Samsung Galaxy J2 Core (SM-J260) , the most critical "solid feature" to use in Nandroid Backup Release the buttons when a blue/green warning screen appears
(critical):
Look at the ID:COM box in the top left. If it turns blue or light blue, your drivers are working and the phone is connected successfully.
Ported by independent developers on XDA Forums. These are often the best choice for the J2 Core because developers optimize them to bypass specific Samsung security locks (like Knox and DM-Verity). Key Features to Look For
Install ZIP files directly from your computer using ADB sideloading commands if your storage gets corrupted. Finding the Best TWRP Version for Your Model Wipe > Format Data (type 'yes') to remove encryption
: Flashing custom kernels or performance-enhancing ZIP files to reduce lag on the Exynos 7570 chipset.
Open on your PC. It should show an "Added!!" message if your drivers are correct.
: Install the latest Samsung Android USB Drivers to ensure your PC recognizes the device.