RAR archive of 6.82 MB bearing only the model code A105FN; the name does not state whether it contains schematics, a board layout, a parts list or firmware, so its contents should be reviewed after unpacking. For smartphone board repair, such files serve to locate parts, measure voltages at test points, and track down shorts on power lines feeding the processor, charger or display. Before relying on them, compare the model code printed on the device with A105FN, since regional variants can differ in hardware.
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 @SMART_PHONE_SCHEMATICS. Enginerys does not host this file.
How to open a .rar file
Compressed archive — the usual wrapper for a schematic + boardview pair or a BIOS + EC set.