SIM card circuit page from the Samsung Galaxy A02s (SM-A02S) schematic in PDF format, 3.70 MB. It covers the SIM socket pinout, supply, clock, data and reset lines and the protection parts between the tray and the baseband side. Use it to track down no-SIM or intermittent detection faults, checking continuity and looking for damaged ESD diodes near the socket. Confirm your handset is an A02s of the same variant before relying on component locations from this drawing.
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