How to Buy a SIM Card in the Puerto Rico in 2026

Whether you need a SIM card for Puerto Rico depends mostly on where your phone plan comes from. Several 2026 travel guides say US phone plans treat the island as domestic, so visitors from the mainland usually need nothing extra (we could not find the carriers' own terms, so check yours). Everyone else, from Spain, Latin America, the UK or anywhere outside the US, pays international roaming on a home SIM. This guide is for them: the three networks, where to buy at San Juan airport, what prepaid plans cost, where the signal fades, and the regional eSIMs we sell that cover Puerto Rico. Our plans for the island are on the Puerto Rico eSIM page.

Liberty, Claro and T-Mobile

Puerto Rico has three mobile networks. Liberty is the former AT&T network on the island. One guide describes Claro as cheaper than Liberty, and T-Mobile runs the third network. Sources disagree on which is best: one guide gives Liberty the best 5G coverage, another says T-Mobile is the better pick if 5G matters to you, and a coverage-map site rates T-Mobile best for speed and coverage on Culebra. In practice all three work well in the cities, so price and convenience decide.

Buying at San Juan airport

Most visitors land at Luis Muñoz Marín International (SJU) in San Juan. One airport guide, our only source for the details, says:

• Liberty sells through the Caribe GSM Store, after security in Terminal A near gate 12, and through SIM vending machines around the airport.
• T-Mobile has a desk in Terminal C.
• Claro SIMs are sold in convenience stores in the central checkpoint area and in Terminals A, B and C.

The same guide gives opening hours of 7 AM to 10 PM in one place and says the shops usually close around 9 PM in another, so do not count on buying a SIM after a late landing. Airport prices tend to be higher than in city stores, and queues can be long in the peak season. Bring your passport: one guide says it is shown at registration, another that formal registration is not normally required but the shop may still ask for it.

What prepaid plans cost

Prices are in US dollars, but the published figures are patchy and contradict each other. The same airport guide lists Claro tourist plans at $29.99 for 1GB over 7 days and $59.99 for 10GB over 30 days, and elsewhere on the page Claro plans of 3GB for 30 days at $15 and 8GB for 30 days at $20. It puts Liberty at around $15 to $35 for various prepaid plans, with unlimited 30-day plans at $65, $75 and $85 depending on the hotspot allowance, and T-Mobile from $15 a month. A 2024 guide says the Claro and Liberty SIM cards are free with a plan, from 18.99 USD on Claro and 25 USD on Liberty. We found no official 2026 price list, so ask in store before you pay.

Where the signal fades

Coverage is strong in San Juan, Ponce, Mayagüez, Bayamón and Caguas. It thins in the mountainous interior and deep inside El Yunque National Forest, where the canopy blocks the signal, so download offline maps before a hike. On Vieques and Culebra the main towns are covered, but remote beaches and the far ends of both islands can have very weak signal or none.

Our eSIMs for Puerto Rico

If you would rather not hunt for a SIM after a long flight, our Latin America plans include Puerto Rico and 15 other Latin American countries, so one plan also covers a stop in Mexico, Colombia or the Dominican Republic. They are data only, start on first use and include hotspot:

• Latin America 5GB: $12, valid 7 days.
• Latin America 10GB: $20, valid 14 days.
• Latin America 15GB: $28, valid 30 days.

For a longer trip across several continents, Orange World 20GB at $28 gives 20GB for 30 days from first use in more than 90 countries, Puerto Rico included, with a French number and some minutes and texts. To keep receiving bank codes on a separate number, the O2 SMS Only eSIM takes texts on a UK number for $8 a month.

Local SIM or eSIM compared

Our recommendation

If your phone plan is from the mainland US, check whether it already covers Puerto Rico before you buy anything. If not, a one-week holiday in San Juan and El Yunque fits the Latin America 5GB plan, and two weeks touring the island, Vieques or Culebra included, fits the Latin America 10GB. Install it at home, switch it on when you land at SJU, and skip the airport counters and their closing times. If you are staying a month and use a lot of data, a Claro or Liberty prepaid plan bought in a city store can work out cheaper, as long as you confirm the price on the day. Step-by-step set-up is in our eSIM installation guide, and every plan for the island is on the Puerto Rico eSIM page.