The robbery happened on August 2nd at 8:50 p.m. on a Bee Line Bus in White Plains.
While on the #40 Bee Line Bus, the suspect stood up and ripped an iPhone from the victim's hands.
According to police, witnesses said the man yelled give me my phone, and then he immediately got off the bus at East Post Road, in the vicinity of White Plains Hospital.
The suspect may have fled towards the Winbrook Housing Complex, police said.
The suspect is not known to the victim, and originally boarded the bus in Mount Vernon.
He is described as 21-25 years old, approximately 6'0 to 6'3, with a thin build.
Photos show him talking on his own phone as he got onto the bus. (CLICK HERE TO SEE PHOTOS)
If you can identify the suspect, contact Westchester County police at 914-864-7700 or (800) 898-TIPS (8477). Email, text messages, photos and small video clips can also be sent to firstname.lastname@example.org.