Three French departments, one rate
The French Caribbean for our pricing purposes is a combined region: Guadeloupe (the main island plus Marie-Galante, Les Saintes, La Désirade), Martinique to the south, and French Guiana on the South American mainland. All three are overseas departments of France — the euro, French language, EU consumer law — but they're a long way from Paris and from each other. A traveler typically does Guadeloupe and Martinique as a hop on the L'Express des Îles ferry, with the optional Dominica stop in between (covered by a separate per-country rate). French Guiana is its own trip — Cayenne, Kourou for the European spaceport, the Maroni river. Same eSIM follows you across all three.
Roamzy charges $0.61 per gigabyte across the French Caribbean. That's $0.0006 per megabyte, billed in real time on the local networks. No subscription, no expiry, no minimum bundle. One per-MB rate across 193 countries is simply what the meter recorded, not a marketing line.
How much will Roamzy actually cost on this trip?
A typical visitor uses 0.5–1 GB per day: maps from Pointe-à-Pitre to a beach on Grande-Terre, the ferry schedule, the camera-translator on a French menu (rare — most are bilingual or English-friendly), video calls home, the satellite-launch updates from Kourou for the curious. Resort and gîte Wi-Fi handles a lot. Call it 0.7 GB/day:
| Trip length | Roamzy ($0.61/GB) | Tourist roaming pass | Cruise-ship Wi-Fi |
|---|---|---|---|
| 1-day port stop (0.5 GB) | $0.31 | — | $20–35 |
| 5 days (3.5 GB) | $2.15 | $30–80 | — |
| 10 days (7 GB) | $4.30 | $60–130 | — |
Competitor prices in columns 3 and 4 are 2025 ranges based on typical offerings; exact figures depend on your home carrier, your hotel, and your cruise line. Roamzy's rate in column 2 is our actual published rate from the pricing page.
The combined rate is one of our cheapest globally — a structural quirk of how French overseas-department telecoms are wholesale-priced. We pass it through. Cruise-day passengers stopping at Pointe-à-Pitre or Fort-de-France get a particularly easy decision.
What works across the region
| Region | 4G/5G | Reality |
|---|---|---|
| Guadeloupe (Pointe-à-Pitre, Basse-Terre, Grande-Terre) | 4G/LTE | Solid in towns and on the resort coasts; weaker in the National Park |
| Marie-Galante, Les Saintes, La Désirade | 4G | Coverage in the villages, gaps on the boats and remote beaches |
| Martinique (Fort-de-France, Le Diamant, Sainte-Anne) | 4G/LTE | Stable across the populated coast; weaker on Mount Pelée trails |
| French Guiana (Cayenne, Kourou) | 4G/LTE | Solid in the coastal cities; rainforest interior is silent |
| The Maroni river / Saint-Laurent-du-Maroni | 4G in town | River journeys upstream are off-grid |
| L'Express des Îles ferry | 4G with gaps | Coverage near both ends, brief silence in mid-channel |
How do I install my Roamzy eSIM?
| Plug type | Voltage | Frequency | iOS | Android |
|---|---|---|---|---|
| Type C, D, E | 230 V | 50 Hz | iPhone XS+ | Pixel 3+, Galaxy S20+ |
- Sign in to Roamzy via Telegram or Google
- Your first eSIM is free and comes with real data on us. After that, top up from $20 in stablecoins (USDT or USDC): no cards, no banks, no FX surcharges
- The QR code appears in your dashboard as soon as the eSIM is issued
- On the iPhone itself (iOS 17.4 or newer), tap Tap to install in the QR card; otherwise Settings → Cellular → Add eSIM → scan QR
- The counter starts the moment you land at PTP (Guadeloupe), FDF (Martinique), or CAY (French Guiana)
Supported stablecoins, networks, and common iPhone/Android setup errors are in the FAQ.
What are Roamzy's honest limitations?
The combined French-Caribbean rate is genuinely cheap and we say it openly — there's no first-purchase promo on top, no fine-print throttle once you've used a few gigabytes, no subscription that auto-renews three months later. Same logic on top-up #1 and top-up #20.
At a dollar and change per gigabyte, a package would only add ways to overpay. The meter, with no fine print and no expiry, is the whole product.
What if my trip continues to other countries?
The French Caribbean is the centre of an inter-island ferry route through the Lesser Antilles, and French Guiana borders Suriname and Brazil:
- Dominica — between Guadeloupe and Martinique on the L'Express des Îles ferry
- Saint Lucia — south of Martinique, separate country rate
- Suriname — west of French Guiana over the Maroni river crossing
- If you want the underlying mechanics — how roaming actually gets priced and why it hurts