Design and Build
At a glance, the O2 X4’s design reflects the compact and sturdy build typical of early 2000s mobile phones. With dimensions of 89.9 x 45.1 x 24 mm and a weight of 116 g, it comfortably fits into the hand, offering reasonable portability. The phone’s body supports a Mini-SIM, adhering to the standard at the time. The physical build, while utilitarian, enhanced by the small clamshell form factor, was popular for its ability to protect the screen and keys when closed.