Strong growth in ICT infrastructure, connectivity, access and use promise great development opportunities but the full potential of the Internet remains untapped, as over half the world's population remains offline. Unless policy-makers address infrastructure, affordability but also broader socio-economic challenges outside the ICT ecosystem, the Internet is liable to reinforce existing inequalities, instead of addressing them. This chapter analyses progress but also the gaps that exist in developing countries—and in particular the least developed countries—in terms of infrastructure, connectivity and quality of service, particularly for mobile and fixed-broadband Internet. It addresses some key connectivity bottlenecks and points to recommendations to overcome these.