GREENVILLE COMMUNICATIONS, LLC, Plaintiff-Appellant, v. CELLCO PARTNERSHIP, (doing business as Verizon Wireless) and Alltel Corporation, Defendants-Appellees, and T-Mobile USA, Inc., Defendant-Appellee, and AT & T Mobility LLC, (doing business as Cingular Wireless), Defendant-Appellee, and Sprint Spectrum, L.P., and Nextel Operations, Inc., Defendants-Appellees