Madison Dearborn Partners, the second-largest shareholder, has thrown its weight behind the deal. Under the terms of the reverse merger announced in October, Deutsche Telekom would end up with 74 percent of the combined company, and MetroPCS would declare a 1-for-2 reverse stock split and pay $1.5 billion in cash to its shareholders. T-Mobile USA, the No. 4 mobile provider in the United States, and MetroPCS want to pool their spectrum resources and networks in order to better compete with larger rivals Verizon Wireless, AT&T Inc and Sprint Nextel Corp. (Reporting by Sayantani Ghosh in Bangalore; Editing by Maju Samuel and Saumyadeb Chakrabarty)