Inside Oppo's factory: how a smartphone is made

We have already seen him assemble his own iPhone from components bought at the electronics markets of Shenzhen, China. This time, the 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 for the Oppo Find X9 series, highlighting both the technical precision and automation that characterize modern smartphone manufacturing. Scotty details the SMT process, including the application of solder paste using 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 position over 1,900 components on each board with great precision, before moving to 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 components are integrated. The assembly also includes connectivity, current flow, and vibration tests, as well as camera calibration. The video offers a detailed look at a highly automated and extremely precise production environment, showing the combination of engineering, robotics, and quality control required to manufacture high-end smartphones at scale