Internet & E-sims in the Caribbean
Tried & Tested
This article was created in paid collaboration with Holafly. As always, all opinions are my own.
The moment I arrive on a new Caribbean island is often when I need mobile data most.
I may need to tell my accommodation that I have arrived, find the ferry terminal, contact a driver on WhatsApp or check the route before getting into a taxi. On Carriacou, for example, being able to send a message makes arranging a pickup or water taxi much easier. In Trinidad, I use mobile data to navigate, contact local drivers and access rideshare services where available.
For me, staying connected is not primarily about posting on social media. It helps me travel more independently, saves time and can even save money. If I can order an Uber or a local alternative, contact a recommended driver or check the usual fare, I am less dependent on the first—and often most expensive—taxi waiting outside the airport.
This is why I prefer to arrange my mobile data before travelling. For an island-hopping trip, a regional option such as the Holafly Caribbean eSIM allows me to prepare everything at home and connect shortly after arriving, instead of looking for a new SIM-card shop on every island.
Why immediate connectivity matters to me
Having mobile data from the moment I arrive makes travelling easier in three important ways.
It gives me more control
I can contact my accommodation, check a route before getting into a car and share my location with someone I trust. If a ferry is delayed or a flight changes, I can make new arrangements without first searching for public Wi-Fi.
A connected phone cannot make travel completely safe. Batteries run out, apps fail and coverage can disappear. But being able to communicate and navigate gives me more options when I arrive somewhere unfamiliar.
It saves time
Buying a local SIM is not always difficult, but it still means finding a shop, waiting to be served and choosing between packages I may only use for a few days.
That becomes particularly inconvenient when island hopping. The Caribbean may appear to be one region, but travelling between islands often means crossing several countries, networks and roaming zones. A short flight or ferry ride can take me somewhere my previous SIM no longer works.
It can save money
Airport and port taxis are not always the cheapest way to travel. Depending on the destination, mobile data allows me to use Uber, a local rideshare service or WhatsApp to contact a driver recommended by my accommodation.
Even where no rideshare app is available, I can check the route and ask about the usual fare before accepting a taxi.
Why my roaming data seems to disappear immediately
My frustration with conventional roaming is not only the price. Whenever I switch it on, my data allowance often seems to disappear within seconds—before I have done anything useful.
As soon as a phone reconnects, apps start working in the background. Emails arrive, WhatsApp downloads media, cloud services sync, and maps or social media apps refresh. A small roaming allowance can therefore shrink quickly, even if I only wanted to check an address.
Even with background updates disabled, I do not want to spend my trip constantly checking how much data remains or worrying that opening Google Maps will use the rest.
For island hopping, having predictable costs and enough data for maps, messages and transport apps is often more valuable to me than finding the absolute cheapest package.
Why Holafly suits Caribbean island hopping
An eSIM is a digital SIM that can be installed on a compatible, unlocked phone without removing the physical SIM card. I can set it up at home using reliable Wi-Fi and activate it after arriving.
At the time of writing, the Holafly Caribbean eSIM offers:
- unlimited mobile data;
- coverage in 18 included Caribbean destinations;
- plans that can be adapted to the number of travel days;
- up to 1 GB of hotspot data per day;
- continued use of an existing WhatsApp number; and
- 24-hour customer support via chat and WhatsApp.
For me, the combination of unlimited data and regional coverage is particularly useful. It means I do not need to start again with a new physical SIM each time I take a flight or ferry to another country.
The most important word, however, is “included.” A Caribbean eSIM does not automatically work on every island in the region. Before purchasing it, I would compare Holafly’s current coverage list with my complete itinerary, including smaller islands and any overnight connections.
This matters in a region where neighbouring islands may belong to different countries and use different mobile networks.
The Holafly Caribbean eSIM is data-only, so it does not provide a local number for conventional calls or text messages. However, WhatsApp continues to work with the existing number, contacts and conversations. That suits the way I travel because many Caribbean accommodations, guides and drivers communicate through WhatsApp.
As with most unlimited mobile plans, fair-use conditions may occasionally affect connection speed. The actual speed and reliability also depend on the local partner network.
Roaming, local SIM or Holafly eSIM?
The best choice depends on the length and style of the trip.
| Option | Best for | Main disadvantage |
|---|---|---|
| Roaming | A short trip with a good international package | Small allowances can be expensive and used quickly |
| Local SIM | A longer stay in one country or travellers needing a local number | Buying and registering it takes time, and it may not work on the next island |
| Holafly Caribbean eSIM | Short stays, late arrivals and multi-island trips | Every destination must be included, and the phone must support eSIMs |
Why an eSIM suits Caribbean island hopping
An eSIM is a digital SIM that can be installed on a compatible, unlocked phone without removing the physical SIM card. I can set it up at home while I still have reliable Wi-Fi and activate the data connection when I arrive.
Holafly’s Caribbean eSIM currently offers unlimited data across 18 included destinations. The length of the plan can be selected according to the trip, and the eSIM connects to a local partner network after arrival.
The important word here is “included.” A plan described as covering the Caribbean does not necessarily cover every island in the region. Before buying it, I would compare its current destination list with my complete itinerary, including any overnight stops or flight connections where I may need data.
This is particularly important on routes involving smaller islands. Two islands can be geographically close while belonging to different countries and using different mobile networks.
The Holafly Caribbean plan is data-only, which means it does not provide a local number for conventional calls or text messages. However, I can continue using my existing WhatsApp number, contacts and conversations. This is especially useful in the Caribbean, where I frequently communicate with accommodations, guides and drivers through WhatsApp.
The plan also currently allows up to 1 GB of hotspot data per day. That should be considered if you want to connect a laptop or share data with another traveller. Although the mobile data is described as unlimited, a fair-use policy can temporarily reduce speeds in some circumstances.
What I check before buying a Caribbean eSIM
Before purchasing any travel eSIM, I check:
- whether every island on my itinerary is included;
- whether my phone supports eSIMs and is network-unlocked;
- when the plan starts and how many days I need;
- whether hotspot use is permitted;
- whether the plan includes a telephone number or data only;
- whether fair-use conditions could affect the speed;
- which local networks are used; and
- what customer support is available if the eSIM does not connect.
Price matters, but it is not the only consideration. A cheap plan is not helpful if it excludes one of the main destinations on my route or provides too little data for navigation and transport apps.
How I set up a travel eSIM without using my usual roaming plan
One part of using a travel eSIM can initially sound confusing: data roaming usually needs to be enabled for the eSIM to connect to its partner network.
The key is to turn roaming on for the travel eSIM—not for the usual German SIM.
My setup is:
- Install the eSIM before departure using reliable Wi-Fi.
- Give the new line an obvious name, such as “Holafly Caribbean.”
- Select the Holafly eSIM as the mobile-data line after arrival.
- Enable data roaming for the Holafly eSIM.
- Keep roaming disabled on the German SIM.
- Turn off automatic mobile-data switching.
This prevents the phone from quietly switching back to the usual provider if the travel eSIM briefly loses its connection.
According to Holafly’s installation instructions, the eSIM should be installed before the trip and activated at the destination. The plan starts once it connects to a supported network.
I would not wait until I was standing outside an airport or ferry terminal to install it. The installation itself requires internet access, and airport Wi-Fi is not something I like to depend on.
Internet coverage still has its limits
Internet access varies considerably across the Caribbean.
Wi-Fi is widely available in hotels and guesthouses, but it may work well in reception and barely reach the room. Power cuts and severe weather can also interrupt both Wi-Fi and mobile networks.
Mobile coverage is generally strongest in towns and populated coastal areas. It can become patchy in mountainous interiors, rainforests, isolated bays and at sea.
No SIM or eSIM can create a signal where the local network has no coverage. This matters on islands such as Dominica, Saint Lucia, Grenada and Trinidad, where some of the most rewarding places to visit are far from the main towns.
My offline backup plan
Even with an eSIM, I never rely entirely on a live connection. Before travelling to another island, I usually:
- download an offline map;
- save tickets and booking confirmations as screenshots;
- screenshot the address of my accommodation;
- save the numbers of drivers and local contacts;
- carry a charged power bank; and
- let someone know where I am going when travelling alone or into a remote area.
An eSIM makes travel easier, but it should complement basic preparation rather than replace it.
Is an eSIM worth it for a Caribbean trip?
For a long stay on one island, a local SIM may still be the cheaper choice. For a resort holiday with reliable Wi-Fi and organised transfers, an eSIM may not be essential.
For the way I travel—independently, often between several islands and beyond the main resort areas—the convenience is easy to see.
Mobile data allows me to contact people as soon as I arrive, arrange transport, navigate and avoid spending part of a short stay inside a phone shop. It can help me find a less expensive ride and means I do not have to ration a tiny roaming allowance that seems to disappear the moment my phone reconnects.
I would not choose a regional eSIM simply because it has “Caribbean” in its name. Coverage must match the exact route. But when it does, an eSIM solves one of the recurring frustrations of island hopping: arriving in a new country and having to start the search for mobile data all over again.
For me, its greatest value is simple. I step off the plane or ferry and can concentrate on where I am going—not on finding a SIM-card shop.
Frequently asked questions
