Testbed for Rural Area Networking -- SNS4D: An OnLine Social Network System for Developing Countries -- RuKaCS: A Community Services and Proximity Networks Project -- Achievable Capacity Design for Irregular and Clustered High Performance Mesh Networks -- VHF Spectrum Monitoring Using Meraka Cognitive Radio Platform -- Open BTS, a GSM Experiment in Rural Zambia -- Performance Evaluation of RSSI Based Distance Measurement for Localization in Wireless Sensor Networks -- SolarMesh - Deployment Aspects for Wireless Mesh Networks -- Emerginov: An Open PHP PaaS to Stimulate and Animate Local Co-innovation -- Introducing Nika NOW: A Mobile Platform for Hyperlocal Media in South Africa -- Analysis and Design of Mobile Payment Platform in African Context -- A Mobile Commerce Solution for Sub-Saharan Countries Such as Cameroon.

This book constitutes the thoroughly refereed post-conference proceedings of the 4th International ICST Conference on e-Infrastructure and e-Services for Developing Countries, AFRICOMM 2012, held in Yaounde, Cameroon, in November 2012. The 24 revised full papers presented were carefully reviewed and selected from numerous submissions. The papers cover a wide range of topics in the field of information and communication infrastructures and are grouped in topical sections on: e-Infrastructure, e-Services, e-Society, e-Health, and e-Security.