Top 10 eSIM providers for Cartagena in 2026

The scoring weighted local network quality at 40%, per-GB price at 35%, and activation ease at 25%, with deductions for hidden-fee reports from verified user reviews. Cartagena's geography makes coverage the dominant factor. Ciudad Amurallada, with colonial-era stone walls up to 12 meters thick, attenuates signal in ways flat-terrain cities don't. Providers routing through Claro's 700 MHz band tend to penetrate those walls more reliably than Movistar's higher-frequency deployments. Outside the old city, Bocagrande's high-rise corridor along Carrera 1 has strong coverage from all three Colombian carriers, but La Boquilla, the fishing-village-turned-beach-district 20 minutes north, still has patchy Movistar reception near the warm, brackish mangrove channels. Getsemaní, the neighborhood most budget travellers end up in, sits between the old walls and the diesel-scented Bazurto Market area. Signal there is generally solid on Claro but drops on WOM near the edges of Plaza de la Trinidad.

The most common mistake is buying a physical SIM at the Rafael Núñez International Airport arrivals hall, where the sticky Caribbean heat greets you before your bag does. The Claro and Movistar kiosks at CTG charge 85,000 to 120,000 COP for 10 GB plans that cost 45,000 COP at an Éxito supermarket in Bocagrande or a Claro store on Calle 30 in Manga. Second mistake is assuming an eSIM activated in Cartagena will roam seamlessly to the Rosario Islands. Isla Barú has a Claro tower near Playa Blanca, but the smaller islands in the archipelago rely on a single repeater that drops to 3G. Providers routing through Movistar tend to lose signal entirely past Isla Grande. Third, travellers on the TransCaribe BRT between the Terminal de Transportes and the Centro station sometimes lose data for 2 to 3 minutes near the Bazurto stretch, where the route passes under an overpass and between dense market stalls. That dead zone is carrier-agnostic and lasts about 2 to 3 minutes.

Airalo is not the right pick for everyone. If you're a digital nomad planning to work from a co-working space in Getsemaní or San Diego for 3 or more weeks, the per-GB model gets expensive past 20 GB. Holafly's unlimited plan, despite costing roughly twice as much upfront, breaks even around day 12 for anyone averaging 2 GB daily on video calls. If you're staying exclusively in Bocagrande's hotel zone near the Hilton and Estelar properties along Carrera 1, coverage differences between Claro and Movistar are negligible, and the cheaper aloSIM plan at $3.20 per GB might be the better call. Travellers who need voice calling for local restaurant reservations or arranging boat trips to the Rosario Islands should note that Airalo's Colombia plan is data-only. You'll need a separate voice add-on or a local Claro prepaid SIM from the shop on Avenida Venezuela near the Torre del Reloj for outbound calls.

Colombia's carrier landscape shifted in 2025 when WOM completed its acquisition of Tigo's operations. The practical effect in Cartagena is that WOM now operates Tigo's old towers, but coverage in outer neighborhoods like Crespo, near the airport approach path, and Castillogrande, the residential peninsula south of Bocagrande, remains thinner than Claro's. Movistar holds a strong second position downtown and along the Transversal 54 corridor toward the Universidad de Cartagena campus. For eSIM shoppers, the carrier your provider routes through matters more than the provider's own branding. Airalo and Nomad both appear to route through Claro. Holafly uses Movistar. Maya Mobile connects via WOM. The coverage map at opensignal.com, updated quarterly, is currently the most reliable way to verify which carrier covers your specific Cartagena accommodation before you commit.