Since you disabled Auto Reboot, your phone is still in Download Mode. Hold to exit Download Mode.
Hold down the and Power buttons together to force the device to restart.
Before installing any custom ROM, always check the compatibility with your specific model number and follow the developer's instructions carefully.
: This means OEM Unlocking was not properly activated in Developer Options, or you are trying to flash a TWRP file built for a different model variant of the J2 Core.
Because the storage structure has changed, Samsung's default security check will trigger a boot loop if left unpatched. Connect your phone back to your PC while still inside TWRP. twrp samsung j2 core
Turn off your Samsung Galaxy J2 Core. Then, press and hold buttons simultaneously until you see a warning screen. Press Volume Up to continue into Download Mode.
The Samsung Galaxy J2 Core is a reliable budget smartphone. It runs on Android Go edition. However, its limited storage and performance restrictions can feel limiting. Installing Team Win Recovery Project (TWRP) opens up new possibilities.
Installing TWRP on the J2 Core requires a specific sequence to bypass Samsung's security layers. The process generally involves:
Samsung devices have a security feature called Factory Reset Protection (FRP). You must disable this by unlocking the bootloader via the Android settings menu. Open on your Galaxy J2 Core. Scroll down and tap System , then select About Phone . Since you disabled Auto Reboot, your phone is
Type yes to confirm. This action deletes your user data and clears the built-in storage encryption.
Before using these features, ensure you have completed these steps:
Look for the box in Odin. It will turn blue or light blue, showing a successful connection. Click on the Options tab in Odin.
When the warning screen appears, to enter the bootloader unlock menu. Before installing any custom ROM, always check the
Open on your PC. The "ID:COM" box should turn blue or yellow.
: This is a common security trigger on Android Go editions. Boot back into TWRP, format data again, and flash a no-verity-opt-encrypt.zip file from an external SD card to patch the boot image.