UPDATE: 9/4/13, 10:30 a.m. EDT. The names of the lawyers from Hogan Lovells advising Vodafone on FCC matters have been added to the 10th paragraph of this story. 9/4/13, 5:30 p.m. EDT. Cooley’s role advising Nokia’s CEO Stephen Elop has been added to the 30th paragraph.

At least a dozen big firms are advising on two major M&A deals in the telecommunications sector: Microsoft’s $7.2 billion buy of Nokia’s mobile phone business and the $130 billion acquisition by Verizon Communications of joint venture partner Vodafone Group’s 45 percent stake in Verizon Wireless.