Two islands, two ferries, one tariff
Saint Kitts and Nevis is a federation of two small islands separated by a 3-km strait. The Sea Bridge ferry runs between Basseterre and Charlestown, and most visitors will cross at least once. That's the Caribbean's smallest connectivity puzzle: a tariff that doesn't reset when you change islands, doesn't reset when you leave the resort, and doesn't ask for a paper SIM swap when you board the ferry.
Roamzy charges $7.17 per gigabyte across Saint Kitts and Nevis. That's $0.0070 per megabyte, billed in real time. The eSIM stays attached on both islands and across the strait. One per-MB rate across 193 countries — that's the unvarnished bill, not a marketing line.
How much will Roamzy actually cost on this trip?
Visitor patterns here are predictable: Google Maps from SKB airport to the resort, the Sea Bridge schedule on the way to Nevis, restaurants and a beach bar over WhatsApp, the rare video call. On the cruise, the data window is six to eight hours of shore leave. Plan on 0.5 GB/day on cellular:
| Trip length | Roamzy ($7.17/GB) | Tourist roaming pass | Local SIM at the airport |
|---|---|---|---|
| 1-day cruise stop | $3.50 (500 MB) | $25–60 | $15–30 + 30 min queue |
| 5 days (resort + day-trip) | $17.92 (2.5 GB) | $45–110 | $20–40 + 30-day cap |
| 10 days | $35.84 (5 GB) | $80–180 | $25–50 + 30-day cap |
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.
A SIM at Robert L. Bradshaw runs about $15–30 plus passport and the queue. On a single-day cruise stop the queue is the killer; on a resort week the price gap with Roamzy isn't large enough to spend half a morning on it.
Where does Roamzy actually work on the ground?
- Basseterre, Charlestown, Frigate Bay — solid 4G/LTE
- The cruise pier at Port Zante — strong signal, the eSIM grabs the network the moment you disconnect from the ship
- The Sea Bridge ferry crossing — partial signal mid-channel; expect brief drops
- South-east peninsula and Cockleshell Bay — 4G across the developed beaches
- Mount Liamuiga and the rainforest interior — 4G in patches, offline maps mandatory for hikes
- Nevis interior (Mount Nevis hikes, Botanical Gardens) — workable 4G near settlements, weaker in the highlands
Resort Wi-Fi follows the standard Caribbean pattern: lobby strong, room weaker, beach often nothing. The eSIM bridges those gaps without you switching networks.
How do I install my Roamzy eSIM?
| Plug type | Voltage | Frequency | iOS | Android |
|---|---|---|---|---|
| Type A, B, D, G | 230 V | 60 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 (on home Wi-Fi before flying or sailing)
- The counter starts on the gangway at Port Zante or on landing at SKB
Supported stablecoins, networks, and common iPhone/Android setup errors are in the FAQ.
What are Roamzy's honest limitations?
Three traps Roamzy doesn't have, because they were never built in.
- No welcome promo that flips on the second top-up. Top-up #1 and top-up #20 bill the same per megabyte.
- No fine-print throttling on the cruise day or the day-trip to Nevis.
- No auto-renewal you forgot to cancel before flying home from Bradshaw. Balance runs out, the eSIM stops.
Island rates run high, so we kept everything else at zero: zero fine print, zero expiry, zero renewals in Saint Kitts and Nevis. That's engineering discipline, not a campaign.
What if my cruise continues to other ports?
- Antigua and Barbuda — typically the next or previous port
- Saint Vincent and the Grenadines — frequent itinerary pairing further south
- If you want the underlying mechanics — how roaming actually gets priced and why it hurts