This is where many users get stuck. You need to enable Developer Options (tap Build Number 7 times) and toggle on "OEM Unlock". On the SM-X200, this option may disappear and the device may relock after a reboot. Patched fix : After flashing stock firmware, you must complete the basic setup and connect to WiFi for Samsung to "verify" the device, which makes the OEM Unlock toggle reappear.
Custom recovery allows for flashing custom ROMs, zips, and creating full system backups. smx200+custom+rom+patched
This is the most crucial step. It will wipe all data. Charge Your Tablet: Ensure the battery is at least 60-70%. This is where many users get stuck
Navigate to and tap Build Number seven times to release Developer Options. Patched fix : After flashing stock firmware, you
Before rebooting, flash the Magisk APK (renamed to .zip ). This will root the ROM and apply the final kernel patches.
Boot into Download Mode, connect to PC, and use Odin to unlock the bootloader.