Design and Build
The O2 XDA Serra measures a compact 102 x 51 x 18.1 mm and weighs 165 grams, making it quite bulky by modern standards but it was normal for its time, especially given the inclusion of a slide-out QWERTY keyboard. The phone's design is pragmatic, aimed at professionals who needed a reliable communication device. The black color scheme enhances its understated, businesslike appearance. The sturdy body and slightly hefty weight give a sense of durability but also make it less pocket-friendly.