As a globally recognized mobile device manufacturer, OPPO is committed to satisfying its customers by offering advanced technology-equipped products. In order to fulfill this commitment, OPPO collaborates with top global suppliers, enabling the highest quality guarantee right from the onset. The esteemed suppliers, globally recognized for their stellar quality, contribute significantly to the production of the company's devices, such as the A78 smartphone.

Impeccable partnership with quality suppliers provides OPPO with an advantage in manufacturing precise, customized, and high-quality components, thereby reflecting quality at the most basic level in the end products. By obtaining all its components earmarked for the A78 from supplier facilities meeting top industry standards, OPPO indeed is testament to its commitment towards high-grade production.

OPPO also prides itself on its rigorous training program. This program aims to equip the workers with an understanding of the detailed technical documents and specifications required by the components, ensuring the production of optimal quality devices. This is evident in the manufacturing process of A78, where trained workers contribute greatly to the superior quality of this device.

Furthermore, OPPO's robust quality control system is designed to detect and rectify potential defects in its products before they hit the market. The system incorporates testing at various stages, like testing components, production lines, and finished devices, along with random quality checks during the manufacturing process. With these steps, OPPO is able to maintain a high-quality standard for devices such as the A78.

Lastly, a pivotal factor for OPPO's success is its R&D team. By working closely with customers to understand their specific requirements, OPPO's R&D team creates products designed to match exact needs and desires. This is visible in the extensively trialed A78 smartphone; its development included a series of quality verification tests, several months of technical testing alongside material selection, and manufacturing process testing, before making it market-ready.