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.
A US Passport Card can be used for ground border crossings between the US and Canada and the US and Mexico, and for some water entries between the US, Canada, and some nearby sovereign islands. It cannot be used for any air travel where a passport is required. A passport book can be used in any situation where a passport is required.