At Oppo factory: how a smartphone is made

You've already seen Scotty build his own iPhone from parts bought at an electronics market in Shenzhen, China. Now, the tech YouTuber from the Strange Parts channel takes us inside Oppo's main smartphone factory in Dongguan, near Shenzhen. The factory tour shows the step-by-step production process for Oppo's Find X9 series, highlighting the technical precision and automation of modern smartphone manufacturing. Scotty details the SMT process, including applying solder paste with laser-cut stencils, automated solder paste inspection (SPI), and pick-and-place machines handling components as small as 0.4 by 0.2 millimeters. These machines place over 1,900 components onto each board with high precision, followed by automated optical inspection (AOI) and nitrogen-cleaned reflow ovens to prevent oxidation. After SMT, the phones move to the final assembly line for screens, batteries, cameras, and other parts, undergoing tests for connectivity, power, vibration, and camera calibration. The video offers a detailed look into the highly automated, precise environment of a flagship smartphone factory, illustrating the blend of engineering and robotics required for large-scale modern device production