Large 1.55 GB RAR collection of mobile phone schematics, as the Russian title indicates, with no specific brand or model listed. Packs like this typically gather circuit diagrams for many handsets, useful for tracing power lines, charging circuits, display and audio paths, and locating components during board-level repair. Most files inside are likely PDFs readable in any PDF viewer, though some may need dedicated software. Because the archive is mixed, check that each diagram matches the exact model and board revision of the phone on your bench.
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 @videocard_notebook_resistance. 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.