Research international phone and data plans
Roaming (calls or using data services outside of your cellular provider's coverage area) charges can get very expensive. Call your cell phone provider to find out what kind of international phone plans they have for your destination country. Each cell phone provider is different and plans may vary depending on your provider. Alternatively, you can bring an unlocked phone that accepts a foreign SIM card, or purchase a local cell phone and SIM card upon arrival, or rely on wifi where available.
A few weeks before your trip