A PPM file is a data file that may be used to rewrite the ROM of a Nokia, a process which is also called "flashing" the firmware.

Because the PPM files are highly efficient and achieve this efficiency by eliminating irrelevant data, flashing your phone with the wrong PPM can result in your phone's software being in the wrong primary language; the PPM_B file supports the English, German, French, Polish, Romanian and Hungarian languages.