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1&1 AG is developing Germany's fourth mobile network, leveraging open RAN and a cloud-native core. This initiative aims to disrupt the existing market dominated by Deutsche Telekom, Vodafone, and Telefónica Germany (O2) by offering a more flexible and cost-effective alternative.

The network architecture allows for vendor diversity, faster innovation, and programmability, which could lead to lower operational costs. 1&1's 5G core is distributed across data centers, enabling network slicing and automation. The company is transitioning from a mobile virtual network operator (MVNO) to a full network operator, utilizing national roaming agreements with Telefónica Germany during the rollout phase.

The strategy positions 1&1 to cater to both consumer and enterprise markets by providing integrated mobile and fixed connectivity solutions. The success of this network will hinge on its ability to scale and compete against established players while maintaining cost efficiency.