From the Village Voice:
Are you a twentysomething woman who rides the #7 train? A guy may be after your cell phone. Have you seen him? The suspect struck on August 25 at 45th Road and Jackson Avenue, and on August 30 and September 7 at 52nd Street and Roosevelt Avenue. His M.O.: The train stops, he waits for the doors to open, grabs the cell phone, and flees.
He's described as a black male in his 20s, approximately 5'7" -- in two of the robberies he was wearing a white tank top, black shorts, and a white do-rag. If you have any info, call Crime Stoppers at 1-800-577-TIPS (8477). And keep an eye on your phones.