Common tools for Nokia feature phones include the Nokia BEST (Infinity-Box) tool or specialized MTK/Spreadtrum flash tools, depending on the specific chipset revision.
A Flash File (also known as Stock ROM, Firmware, or Flash Firmware) is the operating system software specifically designed for a mobile device. For the Nokia 105 TA-1304, this file contains the set of instructions that tells the hardware how to function, including the user interface, call processing, and hardware drivers. Nokia 105 Ta 1304 Flash File Download