Telefonica Deutschland will discontinue its 2G (GSM) network in the second half of 2028. The spectrum released by this shutdown will be reallocated to 4G/LTE and 5G services, boosting capacity for voice, data, and IoT applications. Most subscribers use modern devices and will experience no service interruption. Only legacy handsets and a few M2M or IoT systems require migration. Telefonica Deutschland provides seamless guidance and consulting support for businesses migrating.
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Telefonica Germany plans to retire 2G network late 2028
Telefonica Deutschland plans to shut down its legacy 2G (GSM) network in the second half of 2028, ending more than thirty years of service. Facing capacity constraints in an increasingly data-driven environment, the operator will repurpose the liberated frequency spectrum toward advanced technologies like 4G/LTE and 5G. This strategic reallocation is designed to increase network throughput, lower latency and support emerging voice, data and IoT applications, enhancing overall connectivity capabilities.
No Consumer Impact Expected: Most Smartphones Already Support VoLTE
Consumers will generally experience no service disruption, as the majority already rely on smartphones compatible with 4G or 5G networks. Voice communications are handled through Voice over LTE (VoLTE), ensuring clear, high-quality calls. Only a minority using legacy handsets limited to 2G or lacking VoLTE support will be impacted. Telefonica Deutschland advises customers to verify device compatibility well ahead of the 2028 shutdown to maintain uninterrupted calling and internet access.
Check Device 4G, VoLTE, And 5G Compatibility Before Migration
Customers should verify whether their device supports 4G, Voice over LTE (VoLTE) or 5G by checking network compatibility in the system settings. Enabling VoLTE routes voice calls over the high-speed 4G infrastructure for improved clarity. Owners of legacy handsets lacking modern modem functionality are advised to upgrade to newer smartphones. Telefonica Deutschland and its partners offer tailored handset bundles and combined deals to facilitate a smooth and seamless transition experience.
Industrial IoT encouraged to upgrade 2G devices to NB-IoT
In many industrial and IoT settings, telematics, alarm, and tracking devices still operate on obsolete 2G networks, limiting performance and support. Companies should audit their existing equipment and replace outdated modules with advanced 4G or 5G variants. For connected machinery, standards like NB-IoT and 5G RedCap deliver efficient, low-power communication. O2 Business provides customized consultation, comprehensive pilot testing, and technical assistance to guide migrations, minimize disruption, and safeguard critical operations.
O2 network data soars twentyfold to 6.4 billion gigabytes
In 2025, the O2 network carried a record 6.4 billion gigabytes of data, representing a twentyfold increase over the past decade. By repurposing legacy 2G spectrum, Telefonica Deutschland unlocks additional capacity for advanced 4G/LTE and 5G services. These reallocations translate into faster throughput and lower latencies while optimizing spectral efficiency. As a result, the network can support emerging IoT deployments with performance requirements and relieve congestion during peak usage periods.
The phase-out of 2G services by 2028 represents a pivotal advancement toward resilient mobile network infrastructure. Reallocating former GSM frequencies to 4G/LTE and 5G will boost bandwidth efficiency. Consumers and enterprises will benefit from enhanced performance, significantly reduced latency, and higher data throughput. Legacy devices limited to 2G will lose connectivity, prompting users to migrate to modern smartphones or IoT endpoints. This transition fosters growth and unlocks new innovation potential.
