1. Download flashtool+driver
https://mega.nz/file/0h0S0QZa#DrZ5_DAguRvq5pm870oyth2SuGoj2g0_eWdZ6JMV0Uk
2. Disable Signature via search : 'advanced startup'
3. Open flashtool-drivers check flashmode driver dan fastboot driver
4. If there is security prompt, choose install anyway
5. Download minimal adb fastboot (1.4.3 recommended) + extract
https://mega.nz/file/0klnTYqa#tXRKOWEAp7fmuT6KL_GqGdD3tJFmvcOfMnmGpOnboLk
6. Open FlashTool64.exe
7. Click Lightning Logo and choose flashmode