Inside Oppo's factory: How a smartphone is made

You've seen him build his own iPhone using components from the electronics market in Shenzhen, China. Now YouTuber Scotty from Strange Parts takes us inside Oppo's largest smartphone manufacturing factory in Dongguan, near Shenzhen. The tour shows step-by-step how Oppo's Find X9 series is made, highlighting both the technical precision and automation involved in modern smartphone manufacturing. Scotty explains the SMT process, including solder paste application through laser-cut stencils, automatic solder paste inspection (SPI), and pick-and-place machines handling components as small as 0.4 x 0.2 millimeters. These machines place over 1,900 components onto each circuit board with high precision, followed by automatic optical inspection (AOI) and reflow ovens. After the SMT process, the phones move to the final assembly line, where screens, batteries, cameras, and other components are integrated. Assembly also includes tests for power flow, vibration, and camera calibration