Cell phones could pose a huge security risk if smuggled in to a prison. While some prisoners use their mobile devices simply for harmless communication or web browsing, others use them for illegal activity. These may include gang control, taunting witnesses, planning escapes, or arrangement of other serious crimes. An example is in New York, an inmate used a cell phone to orchestrate an attempted escape while on a medical transfer. Prisoners have also used cell phones to harass and threaten their victims. There are multiple ways cell phones are smuggled into prison, they are dirty staff, they are smuggled in by visitors, who undergo tougher security checks, by inmates who are permitted to leave.