EXHIBIT A AGREEMENT JOINT FILING OF SCHEDULE 13DA Agreement • April 20th, 2011 • Granite Global Ventures (Q.P.) L.P. • Communications services, nec
Pursuant to Rule 13d-1(k)(l) promulgated pursuant to the Securities Exchange Act of 1934, as amended, the undersigned agree that the attached Schedule 13D is being filed on behalf of each of the undersigned.
