Samsung SM-A05 schematic section covering the SIM card circuit, supplied as a 6.27 MB PDF. Use it when a phone reports no SIM or intermittent SIM detection: it shows the SIM connector pinout, the data, clock and reset lines, the supply voltage and any ESD protection parts between the tray and the processor. Open it in any PDF reader and zoom in on the labels. Confirm the board you are repairing is the SM-A05 variant before trusting component locations, because Samsung revisions can 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 @phoneSchematics. 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.