Each RM number corresponds to a different hardware variant. Flashing an incorrect model will hard-brick the device.
The flash file package is a collection of core system files used to completely overwrite the existing operating system on the phone's MediaTek (MTK) chip. Nokia 150 / HMD RM-1190 Firmware Version: 30.00.11 Processor Type: MediaTek (MTK) nokia rm-1190 flash file 30.00 11