The .mbm file extension is most commonly associated with bitmap images files. The MBM file format allows a user to store multiple bitmap images in a single file. These files are usually used on mobile devices running on the Symbian operating system. The MBM files can contain wallpaper, pictures, start-up images and other graphics used by the Symbian applications.
The .mbm file extension is also used for EPOC multi-bitmap files.
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