This book constitutes the refereed proceedings of the Third IFIP TC 6 International Conference on Wireless Communications and Information Technology for Developing Countries, WCITD 2010 and the IFIP TC 6 International Network of the Future Conference, NF 2010, held as part of the 21st World Computer Congress, WCC 2010, in Brisbane, Australia, in September 2010. The 7 revised full papers presented at WCITD were carefully reviewed and selected from 17 submissions. They cover various topics in wireless and mobile communication, wireless and mobile networks and information technologies and systems and focus on innovative technical research. The 15 revised full papers presented at NF were carefully reviewed and selected from numerous submissions. They deal with important paradigms for the post-IP generation: new architectures, knowledge and piloting planes, network virtualization, green technologies, sensor networks, mobile and wireless networks, and strong security.