Display
At the forefront of interaction with users, the O2 XDA features a 2.2-inch TFT display with a resolution of 240 x 320 pixels, translating to roughly 182 pixels per inch. Although the screen's 65K color palette doesn’t quite match the vibrant displays of modern smartphones, it was adequate for its time. The screen aspect ratio of 4:3 and relatively small size by today’s standard (offering about 30.5% screen-to-body ratio) may feel constrained, but it was quite functional for accessing emails, browsing the mobile web, or using basic applications.