If the tablet reboots back into the stock system, the stock OS has overwritten TWRP. Re-do the process, ensuring "Auto Reboot" is unchecked, and ensure you enter Recovery mode immediately after the flash completes, as shown in this YouTube tutorial . 5. Conclusion
Before you flash anything, you must prepare your environment. Skipping these steps is the number one cause of failure. twrp3021smt560tar
Open Odin on your PC, connect your tablet, click the AP button, and select the twrp3021smt560tar file. If the tablet reboots back into the stock