MCT MTK bypass tool is a small utility run custom payload to disable Bootrom protection (SLA and DAA), watchdog timer, and the handler for USB control transfer. Methods for exploit Bootrom authentication in Mediatek SOCs targeting the Bootrom as it is loading and verifying the preloader executable. The Bootrom is the immutable first stage in the boot process and serves as the hardware root of trust for the SoC. Many MediaTek mobile and tablet SoCs follow a regular boot process, as shown by the following figure.

SP Flash Tool is a portable software can be used from portable storage devices such as USB flash drives or external hard drives whose function is to update firmware, format, readback, and test the internal memory device using a MediaTek system-on-a-chip (SoC).

This experience occurred when I tried repairing the Redmi Note 4 Mediatek (Nickel) brick. Insert the firmware into the SP Flash Tool, and checked all partitions. However, the cust.img file has been replaced with a smaller size than the original. I tried twice with Download Only and Firmware Upgrade. Both failed, and a BROM ERROR STATUS DA EXCEED MAX NUM message appeared.

What should I do if I get a notification Failed to Get PMT Info in the SP Flash Tool? That problem often occurs when flashing Mediatek phones.