A growing number of studies use mobile ethnography and mobile devices to collect data, yet studies reveal a lack of coherent definition and inconsistencies in validity criteria. We draw on relevant literature from tourism, health and retail, and connect research designs utilizing mobile ethnographic methods. We show how these existing studies capture mobilities and social phenomena in boundaryless dynamic settings, allowing researchers to co-create knowledge with their participants. As a result, we offer a framework for mobile ethnography, consisting of four explanatory dimensions: the role of the researcher; focus of research; data collection and tools; and data analysis. Our methodological contribution specifies validity criteria and derives concrete implications for research practices in qualitative interpretive mobile ethnography.