Large 52.5 MB ZIP archive for the Apple iPhone 6, written as 6G in the name. Its size suggests more than a single document, possibly schematics plus boardview files or images, but the name does not list the contents, so open it to check. Technicians use such a pack to find test points, trace power rails and data lines, and locate components for micro-soldering, for example on touch or charging circuits. Make sure the board is the standard iPhone 6 and not the 6 Plus, since the layouts are not interchangeable.
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 @esquematicosparatodos. Enginerys does not host this file.
How to open a .zip file
Compressed archive that every operating system opens without extra software.