. They contain the official software updates for a car’s Engine Control Unit (ECU) or Transmission Control Unit (TCU), but they are usually compressed or encrypted. : This is a raw
🚩 : Not all FRF files can be converted by every tool. Newer ECUs with higher encryption (like Simos 19) may require specific, paid plugins or hardware. frf to bin
This is the simplest form. The file contains a contiguous block of bytes. frf to bin