The Montgomery County Sheriff's Office located at 50 Maryland Avenue, on the Terrace Level of the Judicial Center, accepts gently used cellular phones. The office is open from the time the courthouse is open at 7:30 AM to 6:00 PM, Monday and Fridays and from 7:30 AM to 8:00 PM on Tuesdays, Wednesdays and Thursdays. Please call 240.777.7016 for additional information.