Many modern MTK devices (like those with Dimensity 8100 chips) require a specific "Auth Bypass" utility to enter BROM mode because the manufacturer has locked the protocol. Physical Connection:

Remove legacy libusb / WinUSB conflicts; use zadig to force correct driver.

Use a USB 2.0 port instead of USB 3.0/3.1 (which often causes timing errors). Reliable data sync timing.

simultaneously while plugging in the USB cable to force it into Physical Connection

: Some devices require shorting a specific point on the motherboard (often labeled KCOL0 or KPCOL0 ) to ground while connecting the USB to force BROM mode.

The error message "BROM protocol error: check device environment" is a common technical hurdle when using the SP Flash Tool

This error is essentially a "handshake" failure. It means your computer and the device’s Boot ROM (BROM) started talking, but the connection was severed because the environment wasn't quite right. Here is a comprehensive guide on how to diagnose and fix it. What Causes the "Check Device Environment" Error?