The (or Firmware) is the complete package containing the operating system files. This includes:

There are several scenarios where flashing the stock firmware becomes necessary:

Some Nokia 2.2 builds require an "Authentication File" (.auth) to bypass secure boot. Ensure your firmware package includes this if the tool prompts for it.

: Places like Reddit's r/Nokia, XDA Developers forum for Nokia phones, or specific mobile repair forums might have threads related to Nokia TA-1183 firmware.