O2 Germany's Public Cloud Migration Begins in Earnest

Why It Matters

This migration shows large European telcos can shift critical voice functions to public cloud, unlocking agility, AI‑driven innovation and new monetization pathways while reducing reliance on legacy hardware.

Key Takeaways

• Telefónica Germany migrated 100k voice users to AWS-hosted IMS.
• Mavenir’s cloud‑native IMS supports VoLTE, VoNR, VoWi‑Fi, and NTN.
• Migration targets a few million users in 2024, full rollout by 2027.
• Project showcases Europe’s first telco public‑cloud voice core, enabling AI‑driven services.

Pulse Analysis

The migration of Telefónica Germany’s voice core to Amazon Web Services reflects a decisive step in the telecom industry’s broader cloud‑first strategy. By adopting Mavenir’s cloud‑native IMS, the operator consolidates multiple voice technologies—VoLTE, VoNR, VoWi‑Fi and even satellite‑linked NTN—onto a single, software‑defined platform. This not only reduces the physical footprint of legacy equipment but also leverages AWS Graviton processors for cost‑effective scaling, positioning the network for rapid rollout of new services.

From an operational perspective, the public‑cloud environment enables advanced automation and AI‑driven analytics that were previously impractical on traditional hardware. Telefónica’s automation framework aims to streamline provisioning, fault detection, and feature updates, shortening time‑to‑market for innovations such as AI‑enhanced call quality monitoring and personalized voice services. For customers, the transition promises more reliable coverage across 4G, 5G and emerging non‑terrestrial networks, while the operator gains flexibility to monetize network functions through on‑demand scaling.

Europe’s telecom landscape is watching closely, as Telefónica becomes the first European carrier to run a core voice function entirely in a public cloud. The success could accelerate similar moves by rivals, especially as regulatory frameworks evolve around data sovereignty and cloud security. Coupled with ongoing Open RAN experiments in Germany, this migration underscores a shift toward modular, software‑centric networks that can adapt to AI‑centric business models and new revenue streams, setting a benchmark for the continent’s digital infrastructure roadmap.