The company has a high-powered lobbying firm, Lighthouse Public Affairs, on a $10,000 monthly retainer, Ethics Commission records show. And the Planning Commission just voted to approve a plan to build a 104-foot tower with 12 new antennas in the middle of the residential neighborhood of Diamond Heights. The "monopole" would soar over existing trees and create a major new element on the skyline in a part of town where most construction is limited to four stories.