Best eSIM for San José in 2026
— Ranked by Real Performance

San José sits at the heart of Costa Rica's LTE infrastructure, with Kolbi (ICE) and Claro Costa Rica operating the two most capable 4G LTE networks in the country — both offering solid urban coverage across the Área Metropolitana, though Claro's Band 4 (AWS) deployment gives it a meaningful edge in high-density zones like Escazú and Santa Ana. Most consumer eSIMs roaming into Costa Rica route through Claro's wholesale MVNO agreements rather than Kolbi, which matters because Claro's backhaul is peered directly to NAP of the Americas in Miami, reducing latency for North American travellers. This is a city that suits remote workers, business travellers, and adventure tourists using San José as a base — connectivity is genuinely functional, not just adequate.

• →Claro Costa Rica's LTE network covers approximately 92% of the Greater Metropolitan Area (GAM) on Band 4 (1700/2100 MHz AWS), making it the dominant roaming anchor for most international eSIM providers operating in the country.
• →Kolbi (ICE) launched limited 5G NR trials in San José's central business district in 2023, but as of 2024 no consumer eSIM provider has confirmed live 5G access for roaming subscribers — you will land on LTE regardless of your device's 5G capability.
• →Peak-hour LTE speeds in Escazú and Los Yoses typically measure 30–55 Mbps download via Claro's network — adequate for 4K streaming and video calls, but congestion on Band 4 in Mercado Central and La Uruca can drop this to 8–15 Mbps during midday.
• →Costa Rica has no underground metro system, so transit connectivity is entirely dependent on surface-level LTE — coverage on the InterUrban bus routes (UCABI corridors) between San José and Alajuela is consistent but expect signal gaps in the Río Virilla canyon stretch on Route 1.