Telefónica is translating years of network automation into tangible Level 4 autonomous operations in targeted domains—an inflection point for service quality, cost, and speed at 5G scale. Under its Autonomous Network Journey (ANJ), Telefónica is aligning to the TM Forum Autonomous Networks framework and pushing selected processes to Level 4—closed-loop autonomy with minimal human oversight. The company reports a 70% reduction in flapping-related service impact and removal of manual work in these incidents, advancing this use case to Level 4 maturity. The operator cites 80% faster analyses for planning, operations, and optimization; a 40% drop in capacity issues; more than 90% reduction in sites experiencing high load with widespread customer impact; and a 5% latency improvement via virtual optimization prior to rollout.