O2’s entry into the world of 3G was made with three phones -- its own-branded X4, Nokia’s 6630 and Samsung’s SGH-Z107. Recently, a fourth has bulked out the range, Motorola’s V975. Only two of these phones support video calling natively: the X4 has no capability at all for this, while the Nokia 6630 can manage it only with a separately available accessory. So business users who are keen on O2’s 3G service for video calls will need to choose between the Motorola and the Samsung handsets. Our review centres on the latter.