Files with lmi file extension could be in the past found as firmware recovery files from Homeportal by 2wire.
LMI file extension - Homeportal firmware recovery data
What is lmi file? How to open lmi files?
File type specification:
The lmi file extension was in the past related to HomePortal solution from 2wire.
Seems like the company and its products were acquired by Pace and the fate of this format is a mystery. Probably no longer used and obsolete by now.
This lmi 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.