Chapter three of a Spanish mobile-phone training series, explaining how a phone works, as a 1.75 MB PDF. The name mentions no device or board number, so it serves as theory rather than a model-specific schematic. Lessons of this kind usually walk through the power supply, baseband, RF section, memory and user interface blocks and how signals move between them. A good primer before reading real schematics, it helps a technician understand which block to suspect for a given fault. Opens in any PDF viewer.
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 @canalesquematicos. 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.