Which countries can I use the same SIM card?

Very few. Most South American countries require separate SIM cards. Some Claro plans work across borders but cost more than local options.

Is WiFi calling reliable enough to skip cellular data?

Not for travel. WiFi is spotty outside major cities, and you'll need data for maps, translation, and ride apps when moving around.

Can I buy SIM cards in advance online?

Yes, but it's usually more expensive and slower than airport purchases. Only worth it if you're arriving late at night when counters are closed.

What if my phone doesn't work with local networks?

Buy a cheap Android phone locally for $50-100. Samsung Galaxy A-series phones work well across South America and you can resell when leaving.

How to Stay Connected to Internet in South America

Buy a local SIM card in each country for the best rates and coverage, or get an international eSIM plan before you leave. Most cities have reliable WiFi in cafes and hostels, but rural areas need cellular data. Expect to spend $15-30 per month per country on data.

Research coverage before you go. Check which carriers work best in your specific countries. Claro and Movistar have the widest South American coverage. Vivo dominates Brazil. Download coverage maps and save offline copies.
Unlock your phone. Contact your home carrier to unlock your device at least 2 weeks before travel. You need this for local SIM cards. Check if your phone supports the local frequencies (most modern phones do).
Choose your connection method. For country-hopping: Get an eSIM like Airalo or Holafly for convenience. For longer stays: Buy local SIM cards at airports or carrier stores. For budget travel: Rely on WiFi and buy minimal data as backup.
Buy SIM cards at airports. Hit the carrier counters right after immigration. Bring your passport and cash. Ask for tourist plans with data included. Airport staff speak English and can set everything up immediately.
Download offline tools. Get Maps.me for offline navigation, Google Translate with downloaded language packs, and WhatsApp for messaging. Download city maps and save important addresses before leaving WiFi.
Find reliable WiFi spots. Coffee shops like Juan Valdez (Colombia) and Havanna (Argentina) have free WiFi. McDonald's and Starbucks work everywhere. Most hostels include WiFi, but hotels may charge extra. Coworking spaces offer day passes.

Which countries can I use the same SIM card?: Very few. Most South American countries require separate SIM cards. Some Claro plans work across borders but cost more than local options.
Is WiFi calling reliable enough to skip cellular data?: Not for travel. WiFi is spotty outside major cities, and you'll need data for maps, translation, and ride apps when moving around.
Can I buy SIM cards in advance online?: Yes, but it's usually more expensive and slower than airport purchases. Only worth it if you're arriving late at night when counters are closed.
What if my phone doesn't work with local networks?: Buy a cheap Android phone locally for $50-100. Samsung Galaxy A-series phones work well across South America and you can resell when leaving.