Odin cannot flash files while your phone is booted into the standard Android OS. You must interface with the device bootloader via Download Mode. Power down your Samsung Galaxy J2 Core completely.
Samsung introduced "OEM Lock" to prevent unauthorized flashing.
Rooting and installing custom recovery requires precision. One wrong move can lead to a bootloop or a bricked device. To minimize risk, ensure you have the following: twrp samsung j2 core
Your phone is still sitting on the Download Mode screen, but TWRP is now resting in the recovery partition. You must manually force the phone into recovery. Disconnect the phone from the USB cable.
To help you get the most out of your newly modified device, let me know: Odin cannot flash files while your phone is
Press the button to confirm and enter Download Mode . Step 2: Flash TWRP Using Odin Open the Odin.exe file on your PC as an Administrator. Connect your phone to the PC using the USB cable.
Samsung devices use a proprietary flashing tool called Odin . You connect the J2 Core in Download Mode (usually by holding Volume Down + Power + Home/Bixby while connecting to a PC) to "push" the TWRP .tar file to the recovery partition. To minimize risk, ensure you have the following:
Download the latest version of Odin (the official flashing software for Samsung devices).
This is caused by the Samsung RMM Lock. You must flash an RMM bypass zip file immediately after flashing TWRP, or wait 7 days with an active internet connection for the lock to clear.