Some newer phones skip Brom and go straight to "Preloader VCOM." If your tool requires Brom, you may need to use a "test point" (shorting two pins on the motherboard) to force the device into the correct mode. Final Verdict
With the shift to , secure boot chain , and OEM lock mechanisms , BROM mode access is increasingly restricted. Modern chips (Dimensity series) require authenticated Download Agents (DA) signed with an OEM key.
A massive shift occurred around MediaTek Helio G90 and Dimensity 700. MediaTek replaced the legacy VCOM driver with a protocol.