Beyond flashing, v5.1420 is valuable for digital forensics:
For such chips, only SP_Flash_Tool v5.21xx+ with authentication works. mtk flash tool v51420 top
Extract the MTK Flash Tool v5.1420 zip file and your downloaded stock firmware folder to your PC desktop using a tool like 7-Zip. Step 2: Launch the Application Beyond flashing, v5
Have you already downloaded your device's exact ? Share public link including MediaTek Ecosystem Compatibility
: It supports flashing firmware in several critical formats, including MediaTek Ecosystem Compatibility