Archive for the Apple iPhone 6S, 3.57 MB in RAR format, without detail in the name about the enclosed files. Typical contents are logic board schematics and boardview layouts, useful when diagnosing no-power, boot loop or charging problems and when searching for a short on a main rail. A boardview viewer such as OpenBoardView shows part placement while the schematic explains the circuit. The 6S logic board came in versions with different modems, so verify which one you have.
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 @schematicslaptop. 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.