BT Group leads the UK's shift to open-source 5G infrastructure with Canonical's OpenStack.5G required a distributed architecture and network function virtualization, driving BT Group to adopt open-source solutions.Implementing OpenStack allowed BT Group to deploy 5G to over 75% of the UK population.BT Group needed to virtualize network functions and chose Canonical for expertise in OpenStack deployment.Canonical's telco-grade OpenStack distribution enabled cost-effective and scalable operations for BT Group.Extensive training empowered BT Group's team to operate OpenStack effectively.The collaboration between BT Group and Canonical led to successful 5G deployment across the UK.5G transformation enhanced network performance, customer experience, and scalability for BT Group.BT Group's 5G network allowed for seamless connectivity in high-density areas like sports stadiums.EE was recognized as the UK's Best Mobile Network following the successful 5G deployment.