Telefónica Germany has kicked off the migration of its mobile customers to Mavenir’s cloud-native IMS platform, which is hosted on Amazon Web Services (AWS) cloud.

Mavenir notes that Telefónica Germany has successfully migrated the first 100,000 mobile customers to 4G/5G voice services on the cloud platform.

Software company Mavenir claims that Telefónica Germany is now the first mobile operator in Europe to deploy such a capability with production subscribers in a public cloud.

Mavenir notes that its IMS platform can run on any public, private, or hybrid cloud.

The migration was achieved in the first quarter of this year as part of a multi-year transformation project spanning both fixed and mobile IMS networks.

It's part of the multi-year contract extension announced with Telefónica Germany in February of last year. Mavenir started the extensive lab validation ahead of moving the operator’s 4G/5G voice services in Germany from Mavenir’s virtualized IMS (vIMS) to Mavenir’s cloud‑native IMS platform.

Mavenir said it expects to migrate the first few million mobile customers to the new solution running on AWS cloud during 2026. "The full migration is scheduled for next year, with all sites set to be deployed using automation," noted Mavenir.

“This milestone marks a pivotal stage in transitioning our core network and telecom workloads to public cloud infrastructure," said Matthias Sauder, leading technology & unified connectivity at Telefónica Germany.

"Telefónica Germany’s cloud strategy is built on our firm belief in agility, transparency, and advanced automation, and this migration of our mobile voice services to Mavenir’s cloud-native IMS solution reflects our progressive vision for evolving beyond traditional network models. Mavenir has been a trusted and proven partner in delivering [the] best quality, future-ready services. We are looking forward to driving the next phase of our network evolution jointly – unlocking new levels of efficiency and innovation and creating new value for our customers and across our operations.”

Brandon Larson, SVP & general manager, cloud, AI & IMS business strategy at Mavenir, added: "Forward‑thinking operators are embracing cloud technologies to prepare for an AI‑native, fully automated future, and this transition demonstrates Telefónica Germany’s clear leadership in that journey. Mavenir’s cloud‑native IMS provides the foundation to modernize and future‑proof mobile voice services, enabling new levels of agility while unlocking AI‑driven innovation and fresh monetization opportunities for the years ahead."

Telefónica has close to 32 million customers in Germany, meaning there's some way to go with this migration.