This article presents the results of a field study on mobile ICT learning processes of repairers and vendors operating in the informal economy sector in Haiti. The main objective of this research was to study the emerging process of learning in an informal environment using mobile technologies employed alternately as a tool to learn and communicate and to build a professional identity. Three theoretical axes were mobilized to analyze the concept: human activity mediated by mobile technologies for learning new skills in informal situations; the influence of social context and social practices in the process of informal learning; the influence of trajectories on skills ‘development in an informal setting. This article presents the results related to the first axis concerning actions mobilized for the appropriation of mobile ICTs and learn the profession. Several actions have been listed. They are organized in a system composed of three interrelated factors that showed that learning strategies, commercial activities and instrumental processes are intrinsically related in the sense that they mutually reinforce one another.