A mobile, cellular telecommunications handset (MS1) has a browser to navigate between and provide a display (5) of data from different network addresses. A key (4b) on the device is operable in a first mode e.g. a relatively short press, to navigate between previously listed network addresses. The key is also operable in a second mode e.g. a relatively long press, to provide a selective display of only previously visited homepages so that the user can quickly select a homepage from the previously visited homepage display and navigate directly to the selected homepage.