Fix: The firmware version string you supplied is incorrect, or Samsung has removed that specific version from their active update path. Re-run the checkupdate command to fetch the newest string.
samfirm -m SM-G991B -r BTU download
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# Ubuntu/Debian sudo apt install heimdall-flash heimdall-flash-frontend # Fedora sudo dnf install heimdall # Arch Linux sudo pacman -S heimdall Use code with caution. Step 2: Prepare the Firmware Files
Replace SM-G991B and BTU with your specific Model and CSC. Fix: The firmware version string you supplied is
: An open-source, graphical firmware downloader built with Kotlin that runs on Linux, Windows, and even Android. 5. Post-Download Actions
The original tool is a legacy Windows-only application (developed in C#) used to download official Samsung firmware directly from Samsung servers. Because it relies on the .NET framework, it does not run natively on Linux. This link or copies made by others cannot be deleted
Whether you’re a repair shop technician running Ubuntu, a privacy-focused Arch user, or a developer automating firmware backups, the SamFirm tool on Linux is now a first-class experience—no virtual machines required.
On Windows, Odin is the standard tool used to flash firmware onto Samsung devices. Odin does not exist for Linux, but the open-source community created a perfect substitute: . Step 1: Install Heimdall