The problem addressed by this research is a demand for increased flexibility in access to organisational information, driven by the increasing popularity of mobile devices. Employees increasingly bring private devices to work (Bring Your Own Device, BYOD) or use work devices for private purposes (Choose Your Own Device, CYOD). This puts managers in a difficult position, since they want the benefits of mobility, without exposing organisational data to further risk. The research focuses on management (particularly information security management) issues in the design and implementation of strategies for mobile devices.  There are two objectives. The first is to identify existing information security management strategies for mobile and dual-use devices. The second is to develop a framework for analysing, evaluating and implementing a mobile device strategy. The overall research strategy is inspired by Design Science; where the mission is to develop an artefact, in this case a framework, which will help to solve a practical problem. Methods include literature review, theoretical development, and the collection and analysis of qualitative data through interviews with executives. The main result of this work is the framework, which deals with the complete process, including analysis, design and implementation of a mobile device management strategy. It helps researchers to understand necessary steps in analysing phenomenon like BYOD and gives practitioners guidance in which analyses to conduct when working on strategies for mobile devices. The framework was developed primarily through theoretical work (with inspiration from the mobile security and strategic management literature, and the ISO/IEC 27000 standard), and evaluated and refined through the empirical studies. The results include twelve management issues, a research agenda, argumentation for CYOD and, guidance for researchers and practitioners.