.MI4 File Extension
File TypeAudio Player Firmware File
This file is saved in a binary format, which requires a specific program to read its contents.
What is a MI4 file?
Firmware file used by various audio players that have the PortalPlayer chipset, including SanDisk, Philips, Samsung, and older iPod players; contains low-level software functions and themes that are used to run the audio player.
MI4 files are used to upgrade or change the themes of an audio player.