Case Study: T-Mobile achieves 40% faster release velocity and resilient, scalable performance with VMware Tanzu Application Service

How T-Mobile laid the foundation of its digital future with VMware Tanzu™ Application Service™

T-Mobile embarked on a digital transformation to improve the stability, performance, and delivery speed of its customer‑facing applications. Facing a cumbersome release process (seven months and 72 steps) and the need to support massive traffic spikes—such as the iPhone X launch when competitors experienced waiting lists—T‑Mobile needed a platform that could keep services online and let developers move faster.

T‑Mobile migrated critical middleware to VMware Tanzu Application Service, refactored monoliths into microservices, and took advantage of automatic scaling, four‑layer resiliency, and failover. The platform reduced operational overhead (now operated by 10 people versus hundreds), enabled about 30 cf pushes per day, delivered a 40% increase in release velocity, sustained 10,000 transactions per second with no performance degradation, and helped T‑Mobile sell large numbers of iPhones during peak demand.

T-Mobile

Brendan Aye

Cloud Foundry Platform Architect