An s4mi file extension is related to the Motorola Skin Editor for Microsoft Windows.
S4MI file extension - Motorola Skin Editor data
What is s4mi file? How to open s4mi files?
File type specification:
The s4mi file extension is associated with the Motorola Skin Editor a software for Microsoft Windows that allows users to create custom skins for Motorola smart phones.
The s4mi file stores some kind of data used by Motorola Skin Editor.
This s4mi file type entry was marked as obsolete and no longer supported file format.
This type of file is no longer actively used and is most likely obsolete. This is typically the case for system files in old operating systems, file types from long discontinued software, or previous versions of certain file types (like documents, projects etc.) that were replaced in higher versions of their original programs.