MetroPCS is a corporate partner of the arena. It seemed to aiming both at passers-by (few) and arena patrons (more).
But the Atlantic Avenue side of the arena was never meant for much foot traffic--remember, the Elbow Room there also died. The construction surely doesn't help.
A sign posted inside the window indicates that the outlet was closed as of April 16--perhaps not coincidentally just after the Nets' regular season ended. Metro PCS customers are being directed to the outlet on the Fulton Mall.