This is the brand new modem, recently released for out beloved Canadian S5's. This is NOT a flashable modem, merely the NF3 modem all rar'ed up; just download it, extract it, and flash it via PHONE on Odin 3.09, and you should be golden. If it does not stick, remove the battery for 15 seconds, and get into Download mode via the usual button combinations, then flash away.
G900W8_NF3_MODEM
G900W8_NF3_MODEM