A schematic diagram for Nokia hardware. Shared as “Nokia 309 Asha @phoneschematicRM-843 RM-844 .rar” — a .rar file, 923 KB.
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 @uzb4422. 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.
7-ZipWinRARThe Unarchiver (macOS)