Explainer-How Deutsche Telecom and T-Mobile US could pull off the world's biggest M&A deal
LONDON/BERLIN, April 22 (Reuters) - Deutsche Telekom is exploring a possible tie-up with T-Mobile US to create a $300 billion telecoms giant, sources said, in what would overtake Vodafone-Mannesmann's $203 billion merger in 1999 to become the biggest M&A deal ever.