If you're planning on travelling out of the country and will be using your phone, add travel pass using the Verizon website.
Travel Pass lets you use your domestic talk, text and data in 210+ countries and destinations outside the US. You can call within the country you're visiting and you can call back to the US. Before you turn this feature on, it's always great to make sure it covers the country you'll be visiting. To add this feature, sign into your Verizon account and search for your phone number. Then, scroll down and click on 'Manage Features'. Search for "Travel" and turn the switch on for 'TravelPass'. Press continue and then submit. After that, you're all set!