Saint Martin and Sint Maarten mobile internet needs a two-part check: can your chosen line connect in each territory, and does its paid allowance apply in each territory? A working signal alone does not answer the second question.
This matters if you stay near Marigot or Grand Case and visit Philipsburg, Simpson Bay or Maho. Buying a plan for one side of the island is not proof that the same gigabytes remain available when you use a network on the other side.
We provide data-only travel eSIM plans, not a local number or conventional calls and SMS. The exact French-side and Dutch-side inclusion of the NoveSIM plan discussed here has not been independently confirmed; do not buy it for a two-sided itinerary without checking that specific package first.
Quick answer: Ask for separate confirmation of Saint-Martin, the French territory, and Sint Maarten, the Dutch territory. Telem states that its local prepaid data package does not apply while roaming and identifies use on French Saint Martin as roaming. Current Flow tourist-package prices and cross-island inclusions remain unconfirmed in this guide. A product name, network signal or “Caribbean” label is not enough to establish included data on both sides.
Top Saint Martin French eSIMs
Saint Martin French eSIM
Fixed
1 GB, 7 days€ 5.372 GB, 15 days€ 9.393 GB, 30 days€ 12.97Unlimited
Unlimited, 1 day€ 7.15Unlimited, 3 days€ 19.23Unlimited, 5 days€ 31.75
Two territories, two questions before purchase
Write down where you will actually need internet: your accommodation, arrival point and places you expect to visit. Then ask your home operator or SIM provider to name both territories in its answer. “St Martin” can be used informally for the island, whereas a plan’s destination list may refer only to its French or Dutch part.
Do not assume that a French domestic allowance applies to Sint Maarten, or that a Dutch domestic allowance automatically follows you to the Caribbean. Equally, do not assume every operator excludes both sides. Your own tariff’s destination list, roaming allowance and applicable charges decide the answer.
The distinction also applies to local purchases. A SIM may support a roaming connection across the island without making that connection part of its domestic bundle. Ask whether data is deducted from the purchased allowance or charged against separate prepaid credit.
Telem prepaid: useful short-validity options, with a roaming limitation
Telem’s official mobile page lists prepaid data options including 2.5 GB for one day at $2, 6 GB for three days at $6 and 7.5 GB for seven days at $10. It also describes a TelCell SIM purchase at $20 with $10 call credit. The SIM price and the selected data package are separate items; do not interpret the included call credit as an automatically activated data bundle.
These are published prepaid options, rather than a separately verified all-island tourist package. Check the current price, activation and expiry when purchasing, especially if your stay lasts longer than the selected package.
The crucial restriction appears in Telem’s roaming guidance: the local data subscription is not available while roaming, and prepaid credit is needed for roaming use. Its support page explicitly describes French Saint Martin as outside its local service area for this purpose.
We have not established a specific French Saint Martin per-MB tariff for your chosen prepaid line from the published country table. Do not apply a general Europe or Caribbean rate by guesswork. Ask Telem to confirm that destination’s data charge and whether a separate roaming bundle is available before enabling data roaming.
Where Telem lists in-person service
The official support directory lists two offices:
- Philipsburg: Soualiga Boulevard 5; customer service Monday to Friday, 08:00–16:00.
- Simpson Bay: 40 Airport Road; customer service Monday to Friday, 08:00–15:00.
Airport Road is an address, not confirmation of a counter inside the airport. Check opening hours and SIM availability again before travelling to either office. A reseller’s ability to sell top-up credit also does not prove that it can register and activate a new visitor’s SIM.
Telem publishes identification and address requirements for Postpaid and Flex applications, but we have not confirmed a distinct visitor-prepaid document checklist. Those contract requirements should not automatically be presented as prepaid requirements. Contact the operator with your actual passport nationality and ask what is needed for a short-stay prepaid purchase.
Flow Tourist SIM: what remains unconfirmed
A Flow Chippie Tourist SIM page exists, but its current offer details were not readable during our check. We could not verify its present price, gigabytes, validity, accepted registration documents or terms for using the allowance in both territories.
Older travellers’ reports describe cross-island use and purchases in local shops. They are not a reliable substitute for the current conditions of the SIM you are about to buy. We therefore do not quote an old tourist-package price or promise that a Flow bundle covers the whole island at no extra cost.
Before choosing Flow, request confirmation of:
- The complete starter price, included data and validity.
- Whether the same data allowance applies in French Saint-Martin and Dutch Sint Maarten.
- Whether cross-island use requires roaming settings and incurs separate charges.
- Accepted identification, SIM or eSIM availability, and activation arrangements.
- The current shop address, opening hours and stock for your arrival day.
Airport sales and current Flow shop hours have not been confirmed here. Keep arrival instructions available offline if your plan depends on buying locally.
Checking a NoveSIM plan for Saint Martin and Sint Maarten mobile internet
The NoveSIM Saint Martin product page is the place to inspect available data plans. Its French-territory URL and island-wide wording should not be treated as independent verification of Dutch-side inclusion. Check the selected package’s explicit destinations, or ask support to confirm both territories before paying.
If only one side is confirmed, treat the other side as unsupported for your purchasing decision until you receive clarification. This is a coverage uncertainty, not a claim that the package definitely fails there. Do not use a successful connection near a territory boundary as proof of coverage throughout the other side.
Also check eSIM compatibility, carrier-lock status, data quantity, validity and activation conditions. We provide mobile data for internet apps; a data-only plan does not replace a local number if you need conventional local calls.
Prepare your phone without opening an unexpected roaming bill
- Save your booking details, accommodation address and useful map areas before departure.
- Install a purchased eSIM using reliable internet, following that plan’s activation instructions.
- Select the intended line for mobile data and review automatic data switching.
- Apply roaming settings separately to each line. A travel line may require data roaming, while your home line can incur its own charges.
- Before using the other territory, confirm that your allowance applies there; if it does not, use an agreed alternative rather than relying on signal bars.
You can often keep your existing SIM alongside an eSIM, but keeping that line active does not make its calls or data free. Coverage, speed and hotspot availability also depend on the chosen package, device and local network conditions.
Related Articles
- Inspect NoveSIM Saint Martin data plans
- Check your phone’s eSIM support
- Keep your existing SIM while using an eSIM
FAQ
Does a Sint Maarten SIM automatically include data on French Saint Martin?
No. Connection availability and included data are different. Telem states that its local data package is not available while roaming and identifies French Saint Martin as a roaming location. Other offers need their own check.
Is the current Flow Tourist SIM confirmed to cover both sides?
Not by this guide. We could not verify the current package’s cross-island inclusions, price or registration conditions from the readable official information. Obtain confirmation for the exact offer before purchase.
Can I buy a Telem SIM at its Airport Road office?
Telem lists its Simpson Bay office at 40 Airport Road and describes SIM purchases through branches or resellers. Confirm stock and visitor registration first. The address is not evidence of an airport-terminal counter.
Does NoveSIM’s Saint Martin plan include Sint Maarten?
The exact selected-plan inclusion has not been independently confirmed here. Ask for explicit confirmation of French Saint-Martin and Dutch Sint Maarten rather than relying on the page title. We provide data-only service, not local calls or SMS.
Final Recommendation
Choose Saint Martin and Sint Maarten mobile internet by checking both the connection geography and the billing geography. A plan that works across the island may still charge separately once you leave its local network area.
Telem’s published prepaid options can be assessed for Dutch-side use, but French-side roaming needs a separate allowance-and-price check. Keep Flow’s current tourist conditions marked as unconfirmed until the operator supplies them.
For NoveSIM, confirm both territories in the exact package before choosing it for a cross-island trip. If that confirmation is unavailable, prepare another connection for the unconfirmed side rather than assuming island-wide coverage.