Large 44.5 MB PDF catalogued as a schematic, its Persian file name roughly meaning mobile repairer. The name gives no phone model, brand or board number, so open it to see which devices it covers. Large mobile PDFs like this usually hold circuit diagrams or repair guides used for following power and charging lines, identifying ICs and finding test points. Match any board references inside against the markings on your device before trusting component values or locations.
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 @schematic_mobile5. Enginerys does not host this file.
How to open a .pdf file
The standard format for schematics, block diagrams, power-sequence charts and service manuals.