Staying connected while traveling is no longer optional — but choosing the right solution for St Martin is not as simple as it sounds. Let me help.
I don’t know you yet — but I know one thing for sure. The last thing you want when you land on my island is to run around looking for a SIM card. You just flew in, the air smells like the sea, and the beach is waiting.
But first of all, what’s an eSim?
An eSIM is a digital SIM card that lives inside your phone — nothing to swap, nothing to buy at the airport. You set it up from your couch before you leave, scan a QR code, and that’s it. When you land, you switch it on and you’re connected.
Your regular SIM stays in your phone. Calls and texts still work as usual through your home plan.
One thing to know: an eSIM gives you data only — no local phone number. But honestly? That doesn’t matter here.
Every taxi driver, villa owner, restaurant and beach bar on this island runs on WhatsApp. It’s just how we do things. Internet is all you need.
St Martin is two countries on one island. The French side (Saint-Martin) and the Dutch side (Sint Maarten) run on different networks — and most eSIMs cover one side well and lose signal the moment you cross the border. Whether you call it St Martin, Sint Maarten, Saint-Martin or St Maarten, you’re talking about the same island — but two completely different mobile realities.
Add to that: roads on the island are not always well signposted. You will need Google Maps. You will use it constantly — navigating from Grand Case to Maho, finding that beach bar, getting back to your villa at night. Mobile data is not a luxury here. It’s practical.
Signal is also weaker in some remote areas on the French side — Baie Rouge, Friar’s Bay, the roads up in the hills. A strong regional plan matters more than a cheap local one.
I’ve tested other options — including Holafly, which is popular for the Caribbean. But for St Maarten and Saint-Martin specifically, Airalo’s Caribbean Islands plan is the only one that covers both sides consistently without switching plans.
Here’s what most travelers don’t realize: the French side and the Dutch side run on completely different mobile networks. What works perfectly in Philipsburg can drop the moment you cross into Marigot. There are plenty of eSIM options out there — but very few actually cover both sides reliably on a single plan.
Their Caribbean Islands plan covers both sides of the island on a single eSIM. French side, Dutch side — no switching, no gaps. And if you’re taking a day trip to St Barth, the same plan covers you there too.
One eSIM. The whole island. St Barth included.
For most travelers, the Unlimited 7-day plan at $48.50 is the right choice. No counting gigabytes.
No worrying about running out while you’re navigating or posting photos.
💡 Tip: Buy your eSIM before you fly in — you can do it from your sofa the night before your trip. Your Airalo eSIM is valid for 365 days before activation, so no pressure on timing.
Get your eSIM here →
| Duration | Data | Price |
|---|---|---|
| 3 days | Unlimited | $21.90 |
| 5 days | Unlimited | $37.00 |
| 7 days | Unlimited | $48.50 ⭐ Best value |
Standard data packages (1 GB, 3 GB, 5 GB, 10 GB) also available for lighter use.
🌊 Looking for adventures?
→ See all things to do in St Maarten
→ Day trips to Anguilla from St Maarten
I've lived in St Martin for 25 years — and I'm an epicurean at heart, in love with my island. I've been giving out insider tips for almost 15 years.
Let me help you plan your perfect vacation in St Martin / St Maarten!
→ Vacation Rentals : Start with our own curated selection of villas and rentals — some owners accept direct bookings. If you don’t find what you’re looking for, VRBO and Booking.com have a wide selection.
→ Hotels : TripAdvisor and Booking.com are our go-to for the best rates.
→ Car Rental : Renting a car is essential in St Martin. DiscoverCars searches all local companies for the lowest rates.
→ Tours & Excursions : I book through Viator and GetYourGuide — both offer free cancellation on most tours.
→ Flights : I search Expedia for the best deals to SXM Airport.
→ eSIM : Skip the roaming fees. Airalo works perfectly in St Martin.
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*Transparency note
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It helps support the time and care that goes into creating these guides, so thank you.
