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Continue to ChatT-Mobile bringt Voice-over-LTE https://www.derstandard.de/story/2000080233951/t-mobile-bringt-voice-over-lte?ref=artwh
T-Mobile bringt Voice-over-LTE https://www.derstandard.de/story/2000080233951/t-mobile-bringt-voice-over-lte?ref=artwh