eSIM for Costa Rica

Costa Rica is easy to travel and harder to stay connected in than its reputation suggests. The Central Valley and the main beach towns are fine; the volcanoes, cloud forest and the Osa Peninsula are where your bars disappear. Knowing which of those you are heading into on a given day is most of the battle.

Getting online when you land

Get the profile onto your phone before you leave home. Installation needs wifi, and while both Juan Santamaria near San Jose and Daniel Oduber at Liberia have airport wifi, relying on an airport network to set up the connection you need at that airport is a plan with an obvious flaw.

After landing, switch the profile on and turn on data roaming for it. Give it a couple of minutes while you clear immigration. By the time you reach the rental car desk you should have a working map, which is exactly when you need one, because Costa Rican road signage is sparse and destinations are frequently described as "two hundred metres north of the old fig tree" rather than by street address.

Your home SIM can stay in place for calls. Car rental companies, lodges and shuttle operators will use the number on your booking, and you want it live.

The networks you'll be on

Two operators are in play, and they are not equivalent. Telefonica runs 3G and 4G/LTE. Claro appears here on 3G.

The practical reading: your best experience comes when your handset is attached to 4G on Telefonica, and there will be places and moments where it is not. A 3G connection is a real connection and it will carry messaging, a map tile, a webpage and a voice note perfectly well. It will struggle with a video call, a large photo upload or streaming.

Do not expect 5G, and do not treat its absence as a problem with the eSIM.

If the connection feels slow rather than dead, check which generation your phone is showing before assuming anything is wrong. Nine times out of ten you have simply dropped a tier, and the fix is patience or a hundred metres of walking, not troubleshooting.

Where coverage holds, and where it thins

Dependable: San Jose and the Central Valley including Alajuela, Heredia and Cartago; the Pan-American highway spine; the Guanacaste beach towns of Tamarindo, Playa Flamingo and Playas del Coco; Jaco and Quepos on the central Pacific; La Fortuna town at the base of Arenal; and the Puerto Viejo strip on the Caribbean side.

Thin or absent: the cloud forest around Monteverde and Santa Elena, where terrain does most of the blocking; the mountain roads over the Cerro de la Muerte between San Jose and San Isidro; the Osa Peninsula and Corcovado, which is genuinely remote; Tortuguero, reachable only by boat or small plane and connected accordingly; the higher slopes of Chirripo; and most of the interior of any national park you walk into.

Two specifics worth planning around. The gravel back roads of Nicoya and Santa Teresa lose signal well before they lose their potholes, so do not set off on one without your route already cached. And hanging bridge walks, canopy tours and river trips are all designed to put you deep in vegetation, which is exactly where the connection goes.

What you'll actually use data for here

Navigation, more than anything. Waze is the tool of choice locally and the route it gives you will often differ from a paper plan for good reasons, including river crossings and unpaved shortcuts you should not take in a two-wheel-drive car.

After that: WhatsApp for confirming tours, shuttles and lodges, since almost every operator in the country runs their bookings through it; weather radar, which matters enormously in green season when an afternoon storm decides whether a hike happens; and translation for the places where English thins out, which is sooner than the tourist brochures imply.

You will also want data for the small administrative things that catch travellers out: filling in an online entry or exit form, checking a shuttle pickup window, and confirming a card transaction that your bank flags because it came from a country you do not usually spend in.

Before you fly

Cache offline maps for the whole country rather than city by city. Costa Rica is small enough that this is cheap in storage and it covers you for every mountain road you did not plan to be on.

Screenshot your lodge directions exactly as the lodge writes them, landmarks and all, plus a pinned coordinate if they give one. Coordinates are far more useful than addresses here.

Take a power bank and a waterproof pouch. Humidity, rain and heat are constant, and a phone that spends the day searching for a weak signal will not last until dinner.

Finally, decide in advance which days are offline days. Booking a Corcovado trip or a Tortuguero stay and telling people at home that you will be out of contact turns a coverage gap into a plan rather than a problem.