| Item | Requirement | |------|--------------| | | Windows 10/11 x64 or Ubuntu 20.04+ | | USB cable | USB-C 3.0 (data + power) | | Device mode | Battery ≥ 50% | | Tools | fastboot , SP_Flash_Tool_v5.2224+ (Unisoc), or UpdateVMM.exe (vendor-specific) | | Firmware file | VMM_SP9853i_1H10_vX.X.X.bin (signed by OEM/Unisoc) |