# Heimdall Heimdall is a cross-platform open-source tool suite for communicating with Samsung mobile devices in download mode and flashing firmware images. ## Disambiguation **Heimdall**—without a trailing “r”—is the Samsung flashing tool. It is not [[Heimdallr|Heimdallr]], the unresolved label preserved in this vault’s Apple crash-log context with [[CrashCapture|CrashCapture]]. The names must remain separate. ## Authority boundary Heimdall transports images and commands through Samsung’s download-mode protocol. Acceptance remains constrained by device-side bootloader state, signature enforcement, partition compatibility, and rollback policy. ## Source - [[Index - Stages of Interception#Vendor firmware writers — Odin, and why the front end is not the authority|Stage 3 Odin analysis]]. - Glass Echidna project repository: https://github.com/Benjamin-Dobell/Heimdall