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1&1 AG has launched Germany's fourth mobile network, utilizing open RAN and cloud-native technology to challenge the dominance of existing providers like Deutsche Telekom, Vodafone, and Telefónica Germany. This new network aims to offer a flexible, cost-effective alternative with features such as vendor diversity and network slicing, while 1&1 transitions from a mobile virtual network operator to a full network operator. The initiative is designed to serve both consumer and enterprise markets, focusing on integrated mobile and fixed connectivity solutions.