Auth Bypass !!install!! | Mt6789

The MT6789 (MediaTek Helio G99) authentication bypass is a specialized procedure used by technicians and hobbyists to flash firmware or bypass FRP (Factory Reset Protection) on devices where the manufacturer has locked the BROM (Boot ROM). Modern MediaTek security typically requires a signed "auth file" for any data transfer; an auth bypass tricks the device into accepting unsigned commands. 1. The Core Mechanism: BROM Mode

The MediaTek MT6789, also known as the Helio G99, is a modern 6nm chipset found in many mid-range smartphones released around 2022 and later. Because it uses MediaTek's V6 security protocol, traditional BROM-level exploits (like the famous Kamakiri exploit used for older MTK chips) generally do not work on it.

TFM Tool Pro MTK (v2.3.0+): This tool introduced "Auth Free" support for MT6789, specifically targeting 2024 security patches for Tecno and Infinix .

B. DA auth bypass via downgrade attack

• If the device’s Preloader version is older (from factory images), sometimes the BROM accepts a v5 or v6 DA that doesn’t enforce SLA correctly.
• By forcing the device into BROM mode (shorting CLK/DAT or using EMMC_AUTH bypass) → load an unauthenticated DA → flash/write anything.