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 will need a valid passport if you are thinking about taking a vacation abroad, frequently travel outside of the US, have a job that will require international travel, or have family living overseas that you would like to visit. There are currently two types of documents for US citizens: passport books and passport cards.