If you see ERROR: USB device not found (0x3f) , you missed the 3-second window. Repeat steps 5–6.
Coolsand RDA Flash Tool is a utility used to flash firmware, unlock passwords, and reset Chinese feature phones or Android devices running on RDA/Coolsand chipsets. Download Links & Resources coolsand rda flash tool link
(such as for Gallite 8809). These are compatible with Windows 7, 8, 10, and 11. How to Connect If you see ERROR: USB device not found