A Barnet travel eSIM for Saint Barthélemy starts at $7.65 for 1 GB over 7 days. The product page lists the speed as 4G. Plans run from 7 to 30 days, and unlimited plans are listed separately from $17.55 for 3 days. Coverage is Saint Barthélemy.
Key facts
| Country | Saint Barthélemy |
| Network | Barnet |
| Speed | 4G (published on the product page; subject to carrier Fair Usage Policy) |
| From | $7.65 for 1 GB / 7 days |
| Validity | 7, 15, or 30 days |
| Install | QR code, before you fly |
What a Barnet eSIM costs
The cheapest published plan on the Saint Barthélemy travel eSIM is $7.65 for 1 GB valid 7 days. A 2 GB / 15 day plan is $12.60, a 3 GB / 30 day plan is $17.10, a 5 GB / 30 day plan is $22.95, 10 GB over 30 days is $33.15, and 20 GB over 30 days is $41.65. The 3 GB / 30 day plan is the value pick: a full month for $9.45 more than the 7 day plan, and three times the data. Per gigabyte the buckets improve steadily, from $7.65 down to about $2.08 on the 20 GB plan, so a longer stay is much cheaper per unit.
Network
The plan is sold under the operator name Barnet and the supported country is Saint Barthélemy. The product page publishes the speed as 4G. That is the figure to plan around, and real speed still depends on the mast, the handset, and the carrier Fair Usage Policy. Saint Barthélemy is a French overseas collectivity of about 21 square kilometres, and the plan covers that collectivity only. That distinction matters on this island group: it does not cover Sint Maarten, the Dutch half of the neighbouring island, and it does not cover Guadeloupe or Martinique. Saint Barthélemy is not part of the European Union’s territory, so do not assume a French or European SIM’s home roaming covers it. Coverage is dense in Gustavia, St-Jean, and the coastal roads, and thinner on the more remote north coast.
How much data you actually need
The island is small and villa and hotel Wi-Fi is standard, so 1 GB covers maps, chat, and bookings for a short stay. A week of beach days with daily photo uploads is the 2 GB or 3 GB plan, and 5 GB or 10 GB suits a longer stay or hotspotting a laptop. If you are working from the island for a month, the 20 GB plan at $41.65 is the cheapest per gigabyte on the product.
Unlimited data
Unlimited plans are listed on the same product page, from $17.55 for 3 days, $24.23 for 5 days, $30.60 for 7 days, $32.30 for 10 days, $55.25 for 15 days and $84.15 for 30 days. Unlimited is priced high on this product, so do the comparison before you pay: 3 GB over 30 days costs $17.10, which is slightly less than 3 days of unlimited, and 10 GB over 30 days at $33.15 costs about the same as 10 days of unlimited while lasting three times as long. Unlimited still sits under a Fair Usage Policy, so a hotspot left running all day is exactly what gets slowed.
Dual SIM
Keep your home SIM for calls and bank texts. Turn on data roaming only for the Barnet line. iPhone: Settings, Mobile Data, pick the travel line. Android: Settings, Network, SIMs, set mobile data to the travel eSIM. Do this before you leave the airport Wi-Fi.
Arrival and transit
Most visitors arrive at Gustaf III Airport (SBH) at St-Jean, which takes small aircraft from Sint Maarten and a handful of other Caribbean islands, or by ferry from Sint Maarten’s Marigot and Oyster Pond to Gustavia. Both routes begin on Sint Maarten, and that leg needs its own plan if you want data before you reach St Barths. Install the eSIM on hotel or home Wi-Fi before the flight, then switch the data line on after you clear arrivals. You do not need a local shop or a passport photo for this plan.
Install
- Buy the plan and open the QR code in the order email while you still have Wi-Fi.
- On the phone, add an eSIM and scan that code. Label the line “St Barths”.
- After landing, set mobile data to that line and leave your home number on for texts.
Phone compatibility
The phone must be carrier-unlocked and eSIM-capable. iPhone XS and later, and recent Samsung Galaxy and Google Pixel models, qualify. A locked handset will not take the QR code. Check the lock status with your home carrier before you pay.
FAQ
Q1: How much is the cheapest Saint Barthélemy eSIM?
$7.65 for 1 GB, valid 7 days, on the Barnet plan.
Q2: Which operator is on the plan?
Barnet. The supported country is Saint Barthélemy.
Q3: Does it include calls and SMS?
No. It is a data plan, with voice calls only through apps such as WhatsApp or FaceTime. Keep your home SIM for calls and one-time passwords.
Q4: Is it 5G?
No. The product page lists the speed as 4G. Real speed still depends on coverage and the Fair Usage Policy.
Q5: Can I install it after I land?
Yes, if you can reach Wi-Fi. Installing before the flight is simpler, because the QR download needs a connection.
Q6: Will it work outside Saint Barthélemy?
No. Sint Maarten, Guadeloupe, and Martinique each need their own plan. The island is a French collectivity, not part of the EU’s territory.
Q7: Is there an unlimited option?
Yes. Unlimited plans are listed separately on the same product page, from $17.55 for 3 days.
Q8: Can I share it as a hotspot?
Yes, within the data allowance. Hotspot traffic counts against the same gigabytes, and heavy sharing can hit the Fair Usage Policy.
Q9: What if the QR code fails?
Use the manual activation code in the same email. The phone still has to be unlocked.
Q10: When were these prices checked?
October 2026, against the published variation prices on travelydata.com.
Bottom line
For a week on St Barths, the $7.65 / 1 GB Barnet plan is the entry point, and the 3 GB / 30 day plan at $17.10 is the one most travellers should buy. A fortnight with daily uploads is 5 GB, a working month is 20 GB at $41.65, and unlimited starts at $17.55 for 3 days. The published speed is 4G, coverage is Saint Barthélemy only, and the buckets are better value than unlimited here.
See Saint Barthélemy eSIM plans
Prices and coverage verified on travelydata.com, October 2026.
