The "failed critical init step 3" error in mtk-su or typically signals that the exploit was unable to initialize properly on your specific device firmware. This is common on Amazon Fire tablets and other MediaTek devices where security patches have blocked the vulnerabilities these tools use. Core Troubleshooting Steps
report that simply re-running the permission command sometimes works after multiple tries. In your terminal, run: chmod 755 mtk-su Attempt to execute again: Verify File Directory Ensure the file is located in /data/local/tmp mtksu failed critical init step 3 best
If mtksu continuously fails at Step 3, it is a sign that the exploit is incompatible with your firmware. The most reliable "best" fix is to move away from temporary exploits and use . Action: Unlock your bootloader. Patch your boot.img using the Magisk app. Flash the patched boot image via Fastboot. MTK Easy SU The "failed critical init step