Fdl2 Failed !!hot!!

: Use the latest version of the ResearchDownload or UpgradeDownload tool (v2.9.9008 or higher) to ensure compatibility with modern protocols.

Modern devices often have strict security. If you attempt to flash unauthorized code without first unlocking the bootloader , the FDL2 stage will fail as a security measure. fdl2 failed

High-speed data writing is sensitive to interference. Try a USB 2.0 port (rather than 3.0) and use the original manufacturer's cable if possible. : Use the latest version of the ResearchDownload