Spd Flash Tool R400001 -

"Failed to write SPD data. Error code: R400001"

Do not use an old ResearchDownload R2.0 . For R400001 , try: spd flash tool r400001

: Fixing "soft-bricked" devices, resolving boot loops, and removing forgotten pattern locks or FRP (Factory Reset Protection). Upgrading/Downgrading : Changing the Android version of a compatible device. Key Specifications : R4.0.0001 Supported File Formats Processor Support : Spreadtrum and UNISOC chipsets : Windows OS Basic Operational Workflow Preparation : Install the necessary SPD USB Drivers "Failed to write SPD data