Schematic for the Samsung SM-G355H in a 3.21 MB PDF; the name carries an additional HrM suffix whose meaning is not certain and is not expanded here. No board revision is given. A handset schematic like this is used to trace supply rails, follow the charging path, read LCD, SIM and camera connector pinouts, and locate components to check when a rail is shorted. It opens in any PDF viewer. Verify the model code on the device before relying on the drawing, as related models differ.
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 @Schematics_Mobile. 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.