The Tecno Phantom X (8/256GB) is likely to be a high-end smartphone with a significant focus on performance, storage capacity, and camera capabilities. The "8/256GB" specification suggests that it might have 8GB of RAM for smooth multitasking and 256GB of internal storage for ample space to store apps, photos, videos, and other data.

Common features in such high-end smartphones often include a large and high-resolution display, powerful processors for smooth performance, a versatile camera setup with multiple lenses for various photography modes, and a robust battery for extended usage.

For the most accurate and up-to-date information, I recommend checking Tecno Mobile's official website or reliable sources for the latest details on the Tecno Phantom X (8/256GB) smartphone.