Apple Demo on Twitter: "Prototype iPhone 3GS (EVT) Red Board running SwitchBoard. These units where Engineering Samples with only a 2GB NAND (storage) installed. The copyright date on the back is 2008.
Test working for iphone 3/3g/3gs Unlocked motherboard full function 8gb used replacement mainboard with full chips Logic Board|Mobile Phone Circuits| - AliExpress
Repair Connector 3 on iPhone 3G and 3Gs and 4 - Replacing the motherboard connector.