The Mobile Passport Control allows U.S. citizens and Canadian passport holders (on B1 or B2 visas) to submit their passport information and customs declaration information via their smartphone or tablet and bypass the regular line to enter the United States. The app doesn’t require pre-approval and is free to use.
The MPC mobile app, is available to U.S. citizens and Canadian B1/B2 citizens visitors. MPC is currently available at the following 46 sites, including 33 U.S. International Airports, 9 Preclearance locations, and 4 seaports of entry:
