AT&T is currently the only wireless carrier that provides underground coverage along SEPTA 's Broad Street Line and Market - Frankford Line .
AT&T would pay SEPTA $3 million , and Titan Outdoor LLC , SEPTA 's advertising partner , would receive $2 million .
AT&T is currently the only AT&T   that provides underground coverage along SEPTA 's Broad Street Line and Market - Frankford Line .
AT&T would pay SEPTA $3 million , and Titan Outdoor LLC , SEPTA 's advertising partner , would receive $2 million .