A Caribbean cruise might take you from Nassau to Ocho Rios, George Town and Philipsburg, with sea days in between. Your phone meets three situations: island networks in port, the ship's own mobile network at sea and, on a ship without one, no signal far from land. The ship's network is the one that surprises people: home operators bill it separately, outside the EU's Roam Like at Home.
This guide covers choosing an eSIM for a Caribbean cruise: avoiding the ship-network bill, the ports one plan covers and misses, and Telcomia's maritime plan for sea days.
Key facts for a Caribbean cruise
- One plan for many ports: the Caribbean zone covers 29 destinations, including the Bahamas, Jamaica, the Cayman Islands and Sint Maarten
- Not in the Caribbean zone: Mexico (Cozumel), Puerto Rico (San Juan) and the US Virgin Islands (St Thomas), which the Americas zone covers
- EU roaming: the Bahamas, Jamaica, the Cayman Islands, Sint Maarten, Puerto Rico, the US Virgin Islands and Mexico are outside it, and so is the ship's own network
- Emergency numbers: 911 in the Bahamas, the Cayman Islands, Sint Maarten, Puerto Rico, the US Virgin Islands and Mexico; in Jamaica, police 119
Three kinds of network on one cruise
In port and near the coast, phones usually connect to the island's land networks instead of the ship's, so a regional plan does the work.
Away from the coast, some ships run their own onboard mobile network: your phone treats it as one more network to roam on, and your home operator bills it separately. On a ship without one, there is no mobile signal far from land, and the ship's Wi-Fi, where offered, is the only connection.
How to avoid the ship-network bill
The fix is a setting, not a purchase: with your home line's data roaming off, it cannot run up a data bill on the ship's network, so switch it off before the ship sails.
The other option is aeroplane mode with Wi-Fi switched back on, which keeps the phone off every mobile network, the ship's included.
Which ports one plan covers
The Caribbean zone covers 29 destinations, among them the Bahamas, Jamaica, the Cayman Islands, Sint Maarten and Saint-Martin, Barbados, Saint Lucia, Aruba, Curaçao and the Dominican Republic.
Three common ports are not included: Cozumel in Mexico, San Juan in Puerto Rico and St Thomas in the US Virgin Islands. They are covered by the Americas zone, whose 25 destinations include the mainland US, where your cruise may start, but not the Bahamas, Jamaica, the Cayman Islands or most other islands.
Which plan fits your trip
For the ports, start with the Caribbean zone; if your itinerary also calls at Cozumel, San Juan or St Thomas, add the Americas zone for those three, or a country plan for the day: Mexico, Puerto Rico or the US Virgin Islands.
For sea days, Telcomia's maritime plans work on ships that run an onboard mobile network: 100 MB for seven days, or 500 MB, 1 GB, 2 GB or 5 GB for 30 days. Because data at sea costs far more to deliver, the plans are small: use them for messages and essentials rather than video.
Standard plans are data only, with calls through apps. Each plan's details show the Activation line, the duration, the data and whether you can share the connection with other devices.
Before you leave
- Install your eSIMs at home on Wi-Fi.
- Set the eSIM you are using as the line for mobile data, with data roaming on for it and off for your home line.
- Check your ports against the plan's destination list, and add a plan for any port it misses.
- If you want the maritime plan, check with your cruise line that the ship runs an onboard mobile network.
- Download offline maps of each port before you sail.
- Keep your eSIMs until the cruise is over: some can be installed only once.
Consular protection: who to call in each port
- 911 reaches the emergency services in the Bahamas (as does 919), the Cayman Islands, Puerto Rico, the US Virgin Islands and Mexico; in Sint Maarten, 911 is the police and ambulance, 919 the fire service and 913 the coastguard.
- In Jamaica, 119 is the police and 110 the ambulance and fire service.
- Several islands have no embassies and are covered from Kingston, San Juan, Miami or further away. The Telcomia app shows which mission is responsible for you, with address and phone.
- If you are an EU citizen and your country has no embassy or consulate covering a non-EU port of call such as Nassau, Ocho Rios or Cozumel, the embassy or consulate of any other EU country must help you on the same terms as its own nationals (Article 23 of the Treaty on the Functioning of the EU).
- Emergency phrases in Spanish, French and Dutch are ready to show on screen in the app.
Questions travellers ask about a Caribbean cruise
Will my phone work on a Caribbean cruise ship?
In port and near the coast, usually yes, on the island's land networks. At sea, only if the ship runs an onboard mobile network, which your home operator bills separately; otherwise, use the ship's Wi-Fi.
How do I avoid the ship's roaming charges?
Turn data roaming off for your home line before you sail, or use aeroplane mode with Wi-Fi switched back on.
Does one eSIM cover every port?
Not always. The Caribbean zone covers 29 destinations, but not Cozumel, San Juan or St Thomas, which are in the Americas zone.
Is the maritime plan worth it on sea days?
Yes, if your ship runs an onboard mobile network and you want messages and essentials at sea. The plans run from 100 MB to 5 GB, sized for staying in touch rather than streaming.
The short version
In port, a Caribbean plan covers many islands, and the Americas zone covers Cozumel, San Juan and St Thomas. At sea, keep data roaming off on your home line and use the ship's Wi-Fi, or the maritime plan if the ship runs an onboard mobile network, for messages.
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