Exhibit B JOINT FILING AGREEMENT The undersigned hereby agree that the Statement on Schedule 13G/A, dated September 9, 2008 with respect to the shares of Common Stock of Inphonic, Inc. and any further amendments thereto executed by each and any of us...Joint Filing Agreement • September 9th, 2008 • Potomac Capital Management LLC • Communications services, nec
This Agreement may be executed in separate counterparts, each of which shall be deemed an original, but all of which shall constitute one and the same instrument.
