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: Change into the SamFirm directory:

Before starting, you must know your device's exact (e.g., SM-G998B for the Galaxy S21 Ultra) and its CSC (Country Specific Code) (e.g., XAA for US Unlocked, BTU for the UK). You can find these in your phone's Settings > About Phone > Software Information . Step 1: Install Dependencies

The "story" of SamFirm on Linux is actually a story of . Since the original SamFirm is closed-source and Windows-dependent, the community did what it does best: they reverse-engineered the protocol. The Hero: Samloader

to run the Windows-based Frija tool if you prefer a GUI

python3 samfirm.py -m SM-N975F -r BTU

Samsung occasionally rotates their encryption nonce. Update your SamFirm-Py fork: