For the international I9300 model, the schematic links the AP to an Intel Wireless PMB9811X Gold Baseband processor , managing 2G and 3G communications.
The schematic is typically divided into sheets that categorize specific functions: Samsung Galaxy S3 I9300 Schematic Diagram
Covers the Broadcom chips for GPS/GLONASS (BCM47511) and the Murata module for dual-band WiFi and Bluetooth 4.0. For the international I9300 model, the schematic links