Schematic for the Huawei Honor 4X, supplied as a 1.16 MB PDF. No model code, board number or revision appears in the name, so check the document title pages for those details. A phone schematic is used to follow rails from the battery and PMIC, check charging and USB paths, read connector pinouts and locate the parts behind a fault or short. It opens in any standard PDF viewer. As Honor 4X units came in several regional variants, confirm your board matches before measuring against it.
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_mobiles. 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.