Schematic PDF titled simply A01, about 7.50 MB, with no brand or full model code in the name. It is likely for a Samsung Galaxy A01, but the contents must confirm that. Service diagrams of this size usually include block diagrams, PMIC and charging pages and connector pinouts. Use it to trace dead rails, find signals between the SoC and peripherals and identify parts around a short. Because regional variants differ, compare the SM- number and board revision on the phone with the document first.
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 .pdf file
The standard format for schematics, block diagrams, power-sequence charts and service manuals.