While more recent versions like have added complex features such as EDL (Emergency Download Mode) support and one-click FRP removal for newer security patches, version 1.21.0 remains popular for its lightweight performance and focus on core firmware tasks. It is particularly useful for users on older hardware or those who only need to flash official Samsung ROMs without the extra overhead of modern security bypass tools. How to Install and Use
The is currently on version 5.4 as of April 2026. The "version 1.21.0" mentioned in your request is significantly outdated, as the tool has since added support for newer Android versions (up to Android 15 and 16) and a wide range of specialized functions for Samsung, Xiaomi, LG, and more. samfw tool version 1.21.0