Inside Oppo's factory: how a smartphone is made

We have already seen him build his own iPhone using components from the Shenzhen electronics market. This time, tech YouTuber Scotty from the channel Strange Parts takes us inside Oppo's main smartphone manufacturing plant in Dongguan, near Shenzhen. The tour shows, step-by-step, the production process of the Oppo Find X9 series, highlighting both the technical precision and the level of automation involved in modern mobile phone manufacturing. Scotty details the SMT process, including solder paste application via laser-cut stencils, automatic solder paste inspection (SPI), and pick-and-place machines capable of handling components as small as 0.4 by 0.2 millimeters. These machines place over 1,900 components onto each board with great precision, followed by automatic optical inspection (AOI) and nitrogen-purged reflow ovens to prevent oxidation. After the SMT process, the phones move to the final assembly line, where screens, batteries, cameras, and other modules are integrated. Assembly also includes connectivity, current flow, vibration, and camera calibration tests. The video offers a detailed look at the highly automated and precise environment of a high-end smartphone factory, showcasing the combination of engineering, robotics, and quality control required to produce modern devices at scale