Use v5.1924 or v5.2020 , often considered the most stable versions for older MediaTek devices like the Redmi 9 series. 4. Apply the "Double-Bypass" Protocol
For many 2026-era security patches (especially Xiaomi/MT6765 devices), you must manually select a custom DA file (like DA_6765_6785_6768_6873_6885_6853.bin ) in the "Download-Agent" field of the SP Flash Tool .
In SP Flash Tool, click Choose next to "Download-Agent" and select the custom DA file. 3. Downgrade Your SP Flash Tool Version