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.
You can also use your passport book for international travel, but a U.S. passport card can only be used as identification if you're returning to the United States from Canada, the Caribbean, Bermuda and Mexico. Any U.S. citizen can use a valid driver's license as identification.