Telefónica reports €77 billion invested over ten years to expand sustainable, resilient connectivity, with SDG 9 (industry, innovation and infrastructure) as the strategic anchor. The operator now serves nearly 350 million accesses, has passed 81.4 million premises with FTTH, and runs one of the largest ultra-broadband footprints globally, second in scale only to China. Spain is Telefónica’s showcase for fiber-led modernization. Dense FTTH has enabled a managed copper switch-off, which simplifies operations, cuts energy use, and improves service quality. The operator targets net zero by 2040 – ten years ahead of many international timelines—and reports a 52% reduction in CO2 emissions across the value chain from 2015 to 2024.