Wi-Fi Calling lets you talk and text from indoor locations where itâs hard even for a strong cellular signal to reach. Wi-Fi Calling can be used in the Domestic Coverage Area (U.S., Puerto Rico, and U.S. Virgin Islands) and from most international countries.
The U.S. Passport Card. This... is the U.S. Passport Card! This card can be used as an official I.D. in many countries abroad. However, it cannot be used for international travel by air. If you are going to travel to an international destination, you will still need to take your passport book with you.
Think of a U.S. Passport Card as something falling between a Passport and a government-issued photo ID. It costs half the price of a passport, but can only be used for land and sea entry into the U.S. from Canada, Bermuda, the Caribbean, and Mexico. It cannot be used for air travel.