Schematic diagram in PDF for the Huawei Honor 4X smartphone, 1.16 MB. The name gives no board number or revision. Opened in any PDF reader, the drawings let a technician search net names, follow power rails from the PMIC, trace charging and USB lines, and check display, backlight and button circuits when locating faults. Text search inside the PDF speeds up finding components by reference. Before relying on part values, compare the board marking and revision on your PCB with the title block of the schematic.
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 @tamirat_moobile. 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.