 This paper reviews the current evidence on the impacts of mobile technologies on tangible health outcomes, mHealth, in low- and middle-income countries, LMICs. Results show there is a growing evidence base for the efficacy of mHealth interventions in LMICs, particularly in improving treatment adherence, appointment compliance, data gathering, and developing support networks for health workers. In many areas, the quantity and quality of the evidence is still limited, in many respects, limiting the number and quality of the studies to be conducted. This article was authored by Charles S. Hall, Edward Fortrell, Sophia Wilkinson, and others.