Bangladesh, May 23 -- The global technology brand OPPO, has recently received certification from Bangladesh University of Engineering and Technology (BUET) for its A Series smartphones, recognizing three key user experience strengths: smoothness powered by ColorOS, long-lasting battery backup for up to 6 years, and dependable all-round durability.

Among the certified areas, smoothness stands out as one of the key strengths of the OPPO A Series lineup. Today's smartphone users expect seamless performance while switching between apps, launching applications, browsing content, gaming, or multitasking throughout the day.

Certified by BUET, selected OPPO A Series smartphones are designed to remain as smooth as a like-new phone even after up...