This procedure assumes your device is in (fully powered off, no battery—Redmi 6A has a removable battery; for 6, disconnect it after opening).
What “Cactus” means in this context
: Load the scatter file into the SP Flash Tool and select "Download" to begin the process. Device Hardware at a Glance Xiaomi Redmi 6A Xiaomi Redmi 6 MediaTek Helio A22 (Quad-core) MediaTek Helio P22 (Octa-core) 5.45" HD+ (1440 x 720) 5.45" HD+ (1440 x 720) AI Face Unlock Fingerprint + Face Unlock : Flashing an Engineering ROM will wipe all user data Xiaomi Redmi 6 6A Cactus Eng Rom