Which carrier to use, where to buy a SIM, eSIM options, and realistic coverage expectations for the Nicoya Peninsula.
Getting a working phone plan sorted before you hit the road down the Nicoya Peninsula will save you a genuinely frustrating afternoon. Coverage here is real but patchy, and the wrong carrier or the wrong plan will leave you staring at a dead signal on a dirt road between Cobano and Mal Pais.
The Short Version: What Most People Should Do
If you are visiting for one to three weeks, buy an eSIM before you leave home. Load it on your phone, and you have data the moment you land in San Jose. If you are staying longer, moving here, or heading deep into the peninsula interior, get a physical Kolbi SIM as soon as you can. That is the honest answer, and everything below is the detail.
The Three Carriers: Who Actually Works Here
Costa Rica has three main networks. On the Nicoya Peninsula, the hierarchy is clear.
Kolbi (ICE) is the government-owned carrier and the one you want. It controls roughly 60% of the national market and has the deepest rural infrastructure. The road from Cobano down to Santa Teresa and Mal Pais, the inland routes through Cabuya, the stretch toward Montezuma, all of these are Kolbi territory. When other networks fade, Kolbi usually holds. wanderflow.app puts it plainly: for anyone going off the main tourist trail, Kolbi is the network that still has signal when the others do not.
Claro has decent coverage in bigger towns and along main highways but drops off fast once you leave the pavement. Some travelers report it works fine in Santa Teresa proper, but do not count on it for anything south of Cobano or on the back roads. It is a backup option, not a first choice for this region.
Liberty is solid in San Jose and Guanacaste tourist corridors. By the time you are on the Nicoya Peninsula tip, it is unreliable. Fine if your trip is mostly urban, not fine if you are living or working remotely down here.
For the Nicoya Peninsula specifically, andreondigital.com notes that Malpais and Santa Teresa are "more variable" and recommends downloading offline maps before driving south from Liberia. That is good advice regardless of your carrier.
eSIM Options: Buy Before You Fly
If your phone supports eSIM (most phones made after 2020 do), this is the cleanest option for visitors. You scan a QR code, install the plan, and arrive with data already running.
The main eSIM providers worth considering for Costa Rica in 2026:
- Airalo (from around $14 for 5GB over 15 days): runs on the Kolbi/ICE network, which gives you the best rural coverage. A solid default for most Nicoya Peninsula trips.
- Holafly (unlimited data, around $35 for 10 days): runs on local partner networks. Coverage is good in tourist areas but can lag in very remote zones. Convenient if you hate tracking data usage.
- Nomad: the one provider currently offering dual-carrier access to both Liberty and Kolbi ICE. If your trip includes Arenal, Monteverde, and then the Nicoya Peninsula, that dual coverage is genuinely useful. andreondigital.com verified this as of April 2026.
Prices shift, so confirm current rates before purchasing. International eSIM providers generally run around $3.90 per GB, per lonelyplanet.com, which is more expensive than buying local but saves you the setup hassle.
One important note: Kolbi and Claro do offer their own eSIM packages, but you have to activate them in-country at a store. That removes most of the convenience. Stick with Airalo, Holafly, or Nomad if you want true plug-and-play.
Physical SIM Cards: Where to Buy and What to Pay
If you want the cheapest per-GB rate and the best rural coverage, a physical Kolbi prepaid SIM is the move. Look for the green frog logo.
Where to buy:
- San Jose Airport (SJO): The staffed kiosks are gone as of 2026. There are SIM vending machines in Terminal A and the rental car lobby, but self-activation can be confusing. A Claro desk sometimes operates near baggage claim, but hours are inconsistent, per wanderflow.app. Better to stop at City Mall in Alajuela (five minutes from SJO) where Kolbi, Claro, and Liberty all have proper storefronts with staff who will set everything up for you.
- Liberia Airport (LIR): All three carriers have stores within 15 minutes. If you are flying into Liberia and driving down to Santa Teresa, sort your SIM here before you hit the road.
- Cobano: There is a Kolbi store in Cobano town. If you arrive via the Paquera ferry and drive through, this is a reasonable place to grab a SIM.
- Supermarkets and pharmacies: Farmacia La Bomba and most supermarkets sell prepaid Kolbi SIMs. You can also top up (recarga) at these same spots.
What you will pay:
- Physical SIM card: around 2,000 colones (roughly $4) for the card itself
- Kolbi prepaid data plan: approximately 5,000 colones (around $10 USD) for 4GB valid 30 days, per costarica-spirit.com
- Kolbi's tourist SIM bundle: 5GB data plus 5GB for apps like WhatsApp and Waze, plus 100 minutes of calls, for 12,000 colones (around $24), per lonelyplanet.com
- Top-ups available at supermarkets, pharmacies, and via the Kolbi app
You will need your passport to buy any SIM. Bring cash. Confirm current prices locally since colone-to-dollar rates and plan structures shift.
Long-term residents and people on valid visas can access monthly plans (around $16 for 10GB and 150 minutes), but tourists are limited to prepaid. If you are figuring out longer-term living costs here, the cost of living guide covers this alongside everything else.
Realistic Coverage on the Nicoya Peninsula
Let us be straight with you. Coverage on the peninsula is functional but not seamless.
What works reliably:
- Santa Teresa main strip and beach road
- Mal Pais village center
- Montezuma town
- Cobano and the road between Cobano and Santa Teresa
Where signal gets thin:
- Inland dirt roads between any of the above towns
- Cabuya and the road toward Cabo Blanco
- Parts of the Nicoya Peninsula interior
- Deep jungle and any significant elevation change
Offline maps are not optional here. Download Google Maps or Maps.me for the entire peninsula before you leave wifi range. The road from Cobano to Santa Teresa has enough signal for most purposes on Kolbi, but do not bet your navigation on it. This matters especially if you are renting a car and driving yourself.
For remote areas like the Osa Peninsula or Corcovado, Kolbi is your only real option and even that drops inside the park. The Nicoya Peninsula is considerably better connected than those places, but the principle holds: Kolbi or nothing.
Wi-Fi as a Backup
Most hotels, hostels, and coworking spaces in Santa Teresa have reliable enough wifi for video calls and remote work. If you are a digital nomad, check the wifi and internet guide and the coworking spaces guide before assuming your mobile data will carry the whole load. It probably will not, especially during rainy season when speeds dip.
FAQ
Do I need to unlock my phone before getting a Costa Rica SIM? Yes. If your phone is carrier-locked to your home network, a local SIM will not work. Check with your carrier before you travel. Most phones sold in the last few years are unlocked by default, but confirm.
Can I buy a SIM card in Santa Teresa itself? There is no dedicated Kolbi store in Santa Teresa as of 2026. Your best options are Cobano (15-20 minutes away) or sorting it at the airport before you arrive. Some small shops sell top-up cards but not new SIMs.
Is WhatsApp calling a good substitute for a local plan? For most social and logistical communication here, yes. Locals, tour operators, restaurants, and accommodation all use WhatsApp heavily. If you have wifi or any data at all, WhatsApp will cover 90% of your communication needs. Kolbi's tourist SIM even includes extra data specifically for WhatsApp.
What if I am staying for several months? Get a physical Kolbi SIM and use prepaid top-ups until you have a residency document that qualifies you for a monthly plan. The moving to Santa Teresa guide has more on the practical steps for longer stays.
Will my eSIM work as soon as I land in Costa Rica? If you bought it from an international provider like Airalo, Holafly, or Nomad and installed it before your flight, yes. You should have data before you clear immigration. Kolbi or Claro's own eSIMs require in-store activation, so those do not work this way.
Find vetted local services including phone shops, tech help, and more at the /directory/services hub.