RAR archive of 865 KB for the Lenovo A3000. The name says nothing about the contents beyond the model, so treat it as unidentified service material until extracted and checked. At this size it cannot be a full firmware package and is more likely a patch, a partition file, a driver or a document. Confirm the device variant matches before using any of it, and back up the existing firmware and calibration data first, since writing mismatched files can cause boot or radio problems.
The button opens the matching file on RM Schematics, or a source page if it is not catalogued there yet. The original attachment is from @Schematics_Mobile. Enginerys does not host this file.
All sources (20)
The same file was posted more than once. If one link is dead, try the next.
How to open a .rar file
Compressed archive — the usual wrapper for a schematic + boardview pair or a BIOS + EC set.