For assistance, please call the EVUS Call Center at 00-1-202-325-0180. The Call Center is available 24 hours per day, 7 days per week, except for U.S. holidays, to answer questions regarding EVUS enrollments. The Call Center is staffed with Mandarin speaking operators. You may also contact the Call Center by email at email@example.com. The Call Center is available to answer questions travelers might have regarding EVUS, but all EVUS enrollments must be submitted online by the traveler or a third party.