Traveling overseas can lead to expensive mobile phone charges if travelers do not plan ahead. Many carriers, including AT&T and Verizon, offer daily passes covering calls and data for about $10 to $12 a day, which can total as much as $170 for a two week trip.

Some providers offer international calling plans, but data charges are often where costs escalate. While travelers once swapped physical SIM cards, newer phones may support built in eSIM technology.

With eSIM capability, travelers can download an international plan directly to their phone through a provider’s app, often saving money and avoiding surprise charges.