Before choosing a SIM card or eSIM in Costa Rica, it helps to understand how the local mobile networks work. Costa Rica has a relatively small but well-developed telecom market, with three main operators providing nationwide service. Overall mobile coverage is strong in cities and tourist areas, while more remote regions can still experience weaker signals regardless of provider.
Costa Rica’s mobile infrastructure is built primarily around 4G/LTE. As of 2025, 5G availability exists but remains limited and is not something most travelers should rely on.
Kolbi (ICE)
Kolbi is operated by the government-owned Instituto Costarricense de Electricidad (ICE) and is widely considered the most reliable network in the country in terms of geographic coverage.

Kolbi’s biggest advantage is its reach. It provides the best signal in rural areas, mountainous regions, and near national parks. If your trip includes places like Monteverde, Corcovado National Park, or long drives between destinations, Kolbi is often the safest choice.
In cities such as San José, Alajuela, and Liberia, Kolbi offers stable 4G/LTE speeds that are more than sufficient for navigation, messaging, video calls, and moderate browsing. Speeds may be slightly slower than Liberty in dense urban areas, but the difference is rarely noticeable for everyday travel use.
Kolbi supports both physical SIM cards and eSIM connectivity through partner providers. For travelers prioritizing coverage over raw speed, Kolbi remains the most dependable option in Costa Rica.
Liberty
Liberty (formerly operating under the Movistar brand) is known for its strong performance in urban and suburban areas. It generally delivers the fastest average mobile data speeds in major cities and popular tourist hubs.

In areas like central San José, Escazú, Santa Ana, Tamarindo, and parts of Guanacaste, Liberty’s 4G network performs very well, making it ideal for travelers who rely heavily on mobile data for work, video calls, or social media. Liberty has also been the most active operator in rolling out early 5G coverage, although this is currently limited to small parts of the capital region.
The downside is that Liberty’s coverage can drop faster than Kolbi’s you move away from populated areas. In remote beaches, jungle regions, or national parks, signal strength may be weaker or unavailable.
Liberty is best suited for travelers staying mainly in cities, resorts, or well-developed tourist zones.
Claro
Claro is the third major mobile operator in Costa Rica and is part of a large Latin American telecom group. Its coverage is solid in urban areas and along main highways but generally not as extensive as Kolbi’s in remote regions.

One area where Claro stands out is international connectivity. Many Claro prepaid plans include international calling minutes to destinations such as the United States and Canada, which can be useful for travelers who need to make regular voice calls abroad.
Data speeds on Claro’s 4G network are reliable for everyday use, though typically slightly behind Liberty in speed tests. Coverage in rural areas is acceptable but not as strong as Kolbi’s, especially outside major travel corridors.
Claro can be a good option if international calling is important, but for data-only travelers, Kolbi or Liberty are often preferred.
Network Coverage Summary for Travelers
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Urban areas (San José, Liberia, Tamarindo): All three networks perform well
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Tourist hotspots: Kolbi and Liberty are both reliable
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Rural areas and national parks: Kolbi offers the most consistent coverage
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Fastest mobile data in cities: Liberty
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International calling bundles: Claro
Understanding these differences makes it much easier to choose the right internet option later in the guide, whether you go with a local SIM card or an eSIM solution that connects to Costa Rica’s strongest networks.