Xiaomi POCO M3 schematic in PDF, labelled as the network section. It should cover the RF and baseband side of the phone, useful when diagnosing no-signal, no-service or antenna problems. A technician can trace transceiver power supplies, antenna paths and related components, then check voltages and continuity against the drawing. Any PDF reader opens it, and text search helps find net names quickly. Make sure the phone hardware revision matches before relying on part references, since variants of a model can differ in RF layout.
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.