Diannah Lowry and Megan Moskos report on a study exploring the impact of the workplace mobile phone in a selection of Australian workplaces. This study involved interviews with 20 workers from different occupational and organisational settings. A consistent theme was the notion of the work mobile phone as a 'double-edged' sword that served to define and bind identity through the continuity of spatial networks but also evoked identity anxiety by invasion into the private domain.