I want to use Mobile Passport for customs when I return to the U.S., do I need to connect to Wi-Fi to use it?
Yes, Mobile Passport requires a Wi-Fi connection to be fully functional. You will be able to enter passport information and answer the Customs and Border Protection questions while offline, but you will need Wi-Fi to submit them. After your plane lands you can use its Wi-Fi if available, or wait to use the airport's Wi-Fi so you can get your QR code receipt before you reach the customs area.
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