The importance of infrastructure and connectivity is recognized by Sustainable Development Goal (SDG) 9, on industry, innovation and infrastructure. The chapter looks at fixed- and mobile- broadband prices, and the affordability of services in developed and developing regions. In addition to addressing supply-side barriers, it examines demand-side barriers outside the ICT ecosystem, including broader socio-economic inequalities, digital and analogue skills, and the availability of relevant local content. The steep rise in mobile-cellular subscriptions worldwide, which began early in this century, is tailing off as the global penetration rate approaches 100 subscriptions per 100 inhabitants. At the same time, there has been a gradual decline in the penetration rate for fixed-telephone subscriptions, owing to the tendency for new users to prefer mobile over fixed lines.