Phone and internet in Réunion Island

Staying connected in an outermost region of France

Réunion sits about 9,300 km from Paris, but for a phone contract it might as well be a suburb. As an outermost region (région ultrapériphérique) of France, fully inside the European Union, it is covered by the EU’s roaming rules the same way Corsica or Brittany would be. That single fact settles most of the practical questions in this guide: your plan should work the way it does at home, the emergency number is the one you already know, and the main thing to plan around is not the network operator, it is the terrain. Coverage on the coast, in Saint-Gilles-les-Bains, Saint-Denis and Saint-Pierre, is as reliable as any French town. Coverage inside Mafate or on the upper trails of the volcano is a different story, and that gap is where a little planning pays off.

This page covers connectivity only. For visa and entry rules, see entry requirements for Réunion Island; for currency and cards, see money and payments in Réunion Island; and for a broader list of avoidable mistakes, see Réunion Island travel mistakes to avoid.

Mobile networks and carriers on the island

Three main operators run networks across Réunion: Orange Réunion, SFR Réunion and Zeop, plus smaller resellers. Coverage from all three is strong along the coastal ring road and in every town, decent in the mid-altitude Hauts, and progressively weaker the further you get from a road.

Area	Typical coverage	What it means for you
Saint-Denis, Saint-Pierre, coastal towns	Full 4G/5G	Normal use, no planning needed
Saint-Gilles-les-Bains, Saint-Leu, west coast	Full 4G/5G	Normal use, including streaming and calls
Cilaos, Salazie, Hell-Bourg (town centres)	Good 4G	Reliable indoors and out; drops on side trails
Route du Volcan up to Pas de Bellecombe	Patchy	Signal comes and goes; do not rely on it
Plaine des Sables, the volcano’s enclos	Weak to none	Treat as offline; download maps beforehand
Mafate (ilets and trails)	Very weak to none	Assume no signal; plan and book in advance

If you are hiking, this table matters more than any roaming rate. A trip into the cirques or a multi-day Mafate trek should be planned with the assumption that you will be unreachable for stretches of a day or more.

EU roaming: what actually works, and what to double-check

Because Réunion is EU territory, EU and EEA mobile plans apply their normal “roam like at home” rules here. In practice, for most European visitors:

• Calls, texts and a data allowance work at the same conditions as in mainland France, no special roaming add-on needed.
• There is no separate “Réunion” charge zone to activate; your phone simply attaches to a local network (Orange, SFR or Zeop) and your existing plan governs the cost.
• A minority of budget or online-only plans exclude French overseas regions from their EU roaming, even though the regulation covers them, so it is worth a two-minute check with your carrier before you fly, especially if your plan is unusually cheap.

Visitors from outside the EU/EEA (UK, US, Canada, Australia, and others) do not get this benefit and should check their own carrier’s international rates for Réunion specifically, since it is sometimes billed as “overseas France” rather than bundled with a mainland-France allowance. For a longer stay, or heavy data use, a local prepaid SIM from Orange Réunion, SFR Réunion or Zeop, available at Roland-Garros airport and in shops in Saint-Denis or Saint-Gilles-les-Bains, is usually the cheaper option and takes about ten minutes to set up.

Whichever plan you use, it is worth having it settled before you land at Roland-Garros, since arranging a SIM or checking a roaming add-on is far easier with a working connection than without one.

Time zone: UTC+4, all year, no daylight saving

Réunion sits on UTC+4 year-round; it does not observe daylight saving time. That gives a moving offset from Europe:

Home time zone	Réunion is ahead by
Mainland France, European summer (CEST)	2 hours
Mainland France, European winter (CET)	3 hours
UK, European summer (BST)	3 hours
UK, European winter (GMT)	4 hours

The practical upshot: a call home at 8pm Réunion time lands around 5pm or 6pm in Paris, and a video call scheduled without checking the season can land an hour off from what you expected. If your trip spans a daylight-saving change in Europe (typically late March or late October), the offset shifts under your feet while you are away.

The emergency number: 112, and what to do where signal fails

112 is the single European emergency number and it works from any phone in Réunion, including a phone with no SIM, no credit, or a locked screen, and it reaches police, fire and medical services. The French-specific numbers also work: 15 for SAMU (medical emergencies), 17 for police, and 18 for the fire brigade (sapeurs-pompiers), who lead most mountain rescues. If you only remember one number, make it 112.

The real risk is not the number, it is the signal. On the route to the volcano, on trails around Piton des Neiges, and throughout Mafate, coverage can vanish for hours. A few things reduce the risk:

• Tell someone your planned route and return time before you set off, the same habit gîte and refuge staff will ask about.
• Download offline maps of your route before leaving a town with a signal; do not count on loading one from the trail.
• If you lose signal in an emergency, moving to higher, open ground (a ridge or a pass) sometimes picks up a distant tower; a flat riverbed inside Mafate is often the worst spot for signal.
• Check trail status with the ONF before setting out; a closed sentier is a bigger practical risk than a weak phone signal, and the two often go together after heavy rain.

Coverage gaps: Mafate, the cirques, and the volcano

This is the section that actually changes how you plan a trip. Réunion’s interior is compartmentalised by the same relief that makes it spectacular, and phone networks follow roads, which do not reach Mafate at all.

• Mafate: no roads means no fibre and very little cell infrastructure. A few ridge points near La Nouvelle or Marla catch a weak signal from towers on the rim of the cirque, but most ilets and most of the trail network have none. Gîtes here run on generator or solar power and rarely offer wifi.
• Cilaos and Salazie: coverage is solid in the town centres, including Hell-Bourg, since both cirques are reachable by road, but it fades quickly on side trails and around waterfalls like the Voile de la Mariée.
• The volcano: signal follows the Route du Volcan reasonably well up to Bourg-Murat and partway toward Pas de Bellecombe, then weakens across the Plaine des Sables and inside the enclos itself. Do not plan on checking whether the crater trail is open by phone once you are already on the plain; check before you leave Bourg-Murat or the Cité du Volcan.

The direct consequence: anything that depends on a live connection, from confirming a gîte bed to changing an online booking, needs to happen before you enter one of these zones, not during. That is also why gîtes in Mafate and many refuges in the Hauts still prefer a phone call or a booking made days ahead over a same-day online reservation; see where to stay in Réunion Island for how accommodation booking works across the island, and hiking in Mafate: planning guide for how far ahead to book a bed there specifically.

Wifi, prepaid SIMs, and eSIMs

Wifi is standard in hotels, guesthouses and most gîtes on the coast and in the accessible cirques (Cilaos, Salazie), and common in cafés and restaurants in Saint-Gilles-les-Bains, Saint-Denis and Saint-Pierre. Inside Mafate, expect it to be rare or absent, and where it exists, slow.

For data on the move, three practical options:

1. EU/EEA roaming (see above): the simplest option for most European visitors, no setup required.
2. A local prepaid SIM: from Orange Réunion, SFR Réunion or Zeop, bought at the airport or in town; useful for non-EU visitors or anyone wanting a dedicated data allowance for a longer stay.
3. An eSIM: several international eSIM providers cover Réunion as part of a France or Indian Ocean data plan; check specifically that Réunion (not just “France”) is listed, since some regional bundles exclude overseas departments.

Whichever you choose, download offline maps, your accommodation confirmations, and any tour vouchers before you leave a town with reliable wifi or data, rather than assuming you can pull them up later.

Practical tips for staying connected

• Check your carrier’s roaming terms for Réunion specifically before you fly, even on an EU plan; a few discount plans exclude French overseas regions despite the regulation covering them.
• Save 112 and the French numbers (15, 17, 18) in your phone before you arrive, and know that 112 works without a SIM or credit.
• Treat any trip into Mafate, the upper volcano trails, or off-road sections of Cilaos and Salazie as offline time: download maps, confirm bookings and tell someone your plan beforehand.
• Book gîtes in Mafate and the Caverne Dufour refuge below Piton des Neiges well ahead by phone or online while you still have a reliable connection; do not expect to sort accommodation from inside the trek.
• Remember the UTC+4, no-daylight-saving offset when scheduling a call home, and double-check it around the European clock change in March and October.
• If your trip includes a full driving loop, see getting around Réunion Island and driving in Réunion Island for how coverage gaps line up with the mountain roads themselves.

A helicopter flight over the interior is one of the few ways to see Mafate, the Trou de Fer and the volcano’s enclos in a single outing without worrying about signal at all, since the operator handles routing and safety from the air.

a helicopter flight over the island departing from Saint-Gilles-les-Bains, which covers Mafate, the cirques and the volcano’s enclos in one flight, is worth booking a day or two ahead while you still have a strong connection in town, since gîtes and boat operators further out are the ones with the least reliable signal.

If your days on the coast include time on the water, book ahead too: a boat trip to swim with whales and dolphins off Saint-Gilles-les-Bains and a quad biking and buggy outing in the Hauts above Saint-Gilles both depend on a phone signal to confirm the morning’s conditions, which is easiest to do from the coast rather than trying to reach an operator from a weak-signal area inland.

For visitors piecing together a full loop of the island in a short stay, a guided tour covering the island in 13 stops removes some of the planning load, including the parts of the route where you would otherwise be navigating without a signal.

Phone and internet in Réunion Island: your questions answered

Does EU roaming work in Réunion Island?

Yes. Réunion is an outermost region of France and the European Union, so EU/EEA mobile plans apply roaming rules exactly as they do in mainland France. Calls, texts and data generally work at the same allowance as at home, though it is worth checking your own carrier’s roaming terms before leaving, since a few budget plans exclude overseas regions.

What is the emergency number in Réunion Island?

112, the single European emergency number, works from any phone, including with no SIM card or credit, and reaches all services. The French numbers 15 (SAMU medical), 17 (police) and 18 (fire and rescue) also work. In the cirques or near the volcano, where a signal can be weak or absent, 112 is still the number to try first, since it can sometimes connect through a different network than your own.

Is there phone and internet coverage in Mafate?

Coverage in Mafate is limited and inconsistent. Some ilets, including La Nouvelle and Marla, get a weak signal on parts of the ridge, while others have none. Do not plan on booking a gîte, calling ahead, or checking anything online once you are inside the cirque; arrange accommodation and any changes before you set off.

Is there wifi in hotels and gîtes in Réunion Island?

Wifi is standard in hotels and guesthouses on the coast, in Saint-Gilles-les-Bains, Saint-Denis, Saint-Pierre and Saint-Leu, and in most gîtes in Cilaos and Salazie. In Mafate, wifi is rare to nonexistent; a handful of gîtes have a weak connection at certain hours, but most have none at all.

Should I buy a local SIM card in Réunion Island?

Most EU/EEA travellers do not need one, since roaming already covers calls, texts and data. Visitors from outside the EU/EEA, or anyone planning a long stay, can buy a prepaid SIM from Orange Réunion, SFR Réunion or Zeop at the airport or in town, which is usually cheaper than non-EU roaming for a two- to three-week trip.

What time zone is Réunion Island in, and does it change?

Réunion is on UTC+4 all year, with no daylight saving time. That puts it 2 hours ahead of mainland France in the European summer and 3 hours ahead in the European winter, which matters when timing a call home or a video call with family.

Can I make calls from the volcano or from Cilaos and Salazie?

Signal reaches most of the road up to Pas de Bellecombe and into the towns of Cilaos and Hell-Bourg, but it thins out on trails between ilets and disappears in parts of the Plaine des Sables and the enclos. Treat any call or data connection above the towns as a bonus, not something to rely on for last-minute bookings.