FILED - 04 December 2023, Bavaria, Munich: Markus Haas, CEO of Telefónica Deutschland, pictured at the headquarters of mobile communications provider Telefónica (O2). The head of Munich-based mobile phone operator O2 sees his company on the upswing even though around 10 million mobile phone customers will leave the O2 network in the next few years. Photo: Sven Hoppe/dpa
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