Best eSIM for Puerto Rico 2026
Puerto Rico is US soil — no passport, no customs line, no roaming fee on most American carriers. Which is exactly why it trips people up: a Puerto Rico eSIM is still its own product, priced and sold separately from a USA plan, because the island runs on its own set of local carriers. Here's what Claro, T-Mobile and Liberty actually cover, why the USA plan in your cart won't work here, and what else is worth knowing before you land.
Your USA eSIM doesn't cover Puerto Rico — checked against the live catalogue
This is the finding that actually matters here, and it runs against the intuition most American travelers bring with them. Puerto Rico is an unincorporated US territory — domestic currency, no border control from the mainland, and most major US carriers (AT&T, Verizon, T-Mobile) treat it as part of their normal domestic coverage, so a regular US phone plan typically just works there without a roaming charge. None of that extends to eSIM marketplaces. Pulled directly from Siima's live catalogue: the "USA" plan's coverage list is exactly one country — US — and Puerto Rico isn't in it. A Puerto Rico eSIM is sold, priced and provisioned as its own separate destination, the same as any other country in this series.
The practical effect: if you bought (or were about to buy) a USA eSIM for a mainland-and-island trip assuming one plan covers both, it doesn't. You need the Puerto Rico-specific plan for the island leg, same as you'd need a separate plan for a separate country.
Claro, T-Mobile and Liberty — no AT&T brand on the island anymore
One wrinkle worth knowing even if it doesn't change which eSIM to buy: AT&T sold its entire Puerto Rico wireless business to Liberty Latin America back in 2020. Mainland AT&T customers still roam domestically onto Liberty's network with no separate charge, but there's no longer an AT&T-branded network actually operating on the island — just Claro, T-Mobile and Liberty. Opensignal's June 2026 report (covering January-March data) splits the honors three ways rather than naming one outright leader: Claro keeps the Coverage Experience award at 9.2 out of 10, T-Mobile wins every speed category outright — 119.5 Mbps average download, 143.7 Mbps on 5G — plus Reliability Experience, and Liberty is closing the gap fast, placing second in six separate award categories. Claro has also publicly committed roughly $150 million in 2026 network investment, and GSMA projects 5G will make up 85% of Puerto Rico's mobile connections by 2030 — well above the Caribbean regional average of 23%.
| Network | Strongest at | Best for |
|---|---|---|
| Claro | Widest physical coverage footprint (9.2/10 Opensignal score); $150M 2026 investment plan. | Rural interior, mountain towns |
| T-Mobile | Fastest and most reliable by every Opensignal speed/reliability metric this year. | San Juan metro, streaming and video calls |
| Liberty | The former AT&T network, now closing the gap — second place in six 2026 award categories. | San Juan metro and most tourist routes |
A roaming eSIM, Siima's included, connects to whichever partner network is strongest wherever you are — you don't need to pick between Claro, T-Mobile and Liberty yourself.
The Puerto Rico-only plan wins here — checked tier by tier
Puerto Rico follows the usual pattern in this series: the country-only plan beats Siima's worldwide plan at every size sold, and by a wide margin given how cheap North American pricing already runs.
| Plan size | Puerto Rico-only | Worldwide (107 countries) | Cheaper option |
|---|---|---|---|
| 1GB / 7 days | $4.25 | $13.06 | Puerto Rico-only |
| 2GB / 15 days | $6.93 | $24.82 | Puerto Rico-only |
| 5GB / 30 days | $14.20 | $56.79 | Puerto Rico-only |
| 10GB / 30 days | $24.91 | $103.90 | Puerto Rico-only |
| 20GB / 30 days | $43.67 | $186.34 | Puerto Rico-only |
Buy the Puerto Rico-only plan unless this trip also covers a stop outside the island, in which case the worldwide plan's wider reach is worth the premium.
The island's real connectivity risk isn't coverage — it's the power grid
Every network in Puerto Rico reaches the populated parts of the island reliably, which makes this guide's "watch for" box a different genre from almost anything else in this series — not a dead zone, a power problem. Puerto Rico's electrical grid, operated by LUMA Energy since 2021, has had a rough run: a New Year's Eve 2024 blackout knocked out power to nearly all 1.47 million utility customers, and the company's own president warned afterward of rotating temporary outages given the grid's fragile state. A major outage months later pushed the governor to set up subcommittees auditing LUMA's contract and exploring alternative operators, and LUMA scheduled another round of planned maintenance outages at the end of March 2026, framed as reliability work rather than emergency repair.
Cell towers generally carry generator backup, and short outages rarely take a network down with the lights — but a major island-wide event is a genuinely different kind of risk than weak signal in a remote valley, and it's worth building into any trip plan rather than assuming connectivity is a solved problem just because the island is domestic US territory.
Coverage by destination
How much data do you need in Puerto Rico?
Most trips split between San Juan and one or two day or overnight excursions, which keeps data needs modest outside a ferry trip to the outer islands.
| Trip type | Recommended data |
|---|---|
| A few days around San Juan | 1-2 GB |
| Add El Yunque, Ponce or Rincón | +2-3 GB |
| Vieques or Culebra ferry day trip | +1-2 GB |
| Full island loop, 7+ days | 5-8 GB |
Spanish and English are both official languages, and most signage and tourism-facing businesses in San Juan run in both — one of the easier language situations in this entire series for English-speaking visitors.