Digital connectivity depends not only on infrastructure, but also on the material devices used to access networks. This study examines electronic devices’ availability and prices in Saint-Louis, a mid-sized Senegalese city, to address the lack of empirical research on African digital markets. With data on material connectivity being scarce, this paper provides a baseline description as grounds for future research. Using a participatory mapping approach over three weeks in September 2024, the research assessed the range, condition, and distribution of smartphones across central and neighborhood markets. Descriptive statistics and spatial analysis illustrate key trends. Results show a market heavily structured around second-hand smartphones, where device quality and prices adjust to economic power. Imported second-hand devices are often high-end, with prices above many new items of cheaper brands, while locally used items have much depreciated prices compared to either new or imported second-hand ones. Market locations are widespread for common items and clustered for specialized devices, consistent with central place theory. By documenting the material foundations of digital communication, this study provides new empirical evidence on African urban device markets and highlights the need to consider material access alongside infrastructure in digital connectivity debates.