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Thailandia eSIM

Usare un eSIM in Koh Samui

Un'isola con un'unica strada ad anello, montagne all'interno e mare aperto all'esterno.

Pubblicato: 21 settembre 2026Ultimo aggiornamento: 21 settembre 2026

Samui airport (USM) is an open-sided field where you walk from the aircraft to a garden terminal. Turn the eSIM on before the wheels touch, because the walk from plane to transfer is short and you will want to message the hotel straight away. The other common route, and the cheaper one, is to reach the mainland by air or road and take the ferry from the Surat Thani side to a pier on the island's west coast; the line thins noticeably in mid-channel. Confirm your pick-up before the boat leaves, and allow slack, because sailings shift with the sea state.

Koh Samui

Com'è Koh Samui su un telefono

Samui takes two kinds of visitor who live quite differently: one books a resort and barely leaves its beach, the other rents a bike, circles the island daily and hops to the neighbouring islands. The island's shape explains almost everything about its signal — houses, shops and hotels cling to the outer ring beside the sea, while the middle is forested mountain with hardly anybody in it. So long as you stay on the ring road, things run smoothly.

All'arrivo

Samui airport (USM) is an open-sided field where you walk from the aircraft to a garden terminal. Turn the eSIM on before the wheels touch, because the walk from plane to transfer is short and you will want to message the hotel straight away. The other common route, and the cheaper one, is to reach the mainland by air or road and take the ferry from the Surat Thani side to a pier on the island's west coast; the line thins noticeably in mid-channel. Confirm your pick-up before the boat leaves, and allow slack, because sailings shift with the sea state.

Dove cambia la copertura

The ring road and the beaches with shops along them carry service almost continuously. The change comes when you turn inland onto the roads climbing to a waterfall or a viewpoint: narrow, steep, roofed over by canopy, they cut out in stretches and in places go for a long while. The coves tucked behind the southern headlands are clearly weaker than the big east-coast beaches. On a day out to a neighbouring island, the line goes once you are past the shore into open water and does not return until the destination island is in sight.

Quanto costa in dati una giornata qui

An ordinary day here runs about 700MB to 1.3GB, mostly maps while riding the ring road, finding somewhere to eat, and the evening upload. Stay a while and work from the cafes on the east side and the figure follows your camera hours. Boat days use less than you expect, because you are outside coverage for hours and then upload the lot at once back at the room — which is when the number jumps.

Quartieri su cui i viaggiatori chiedono

  • Chaweng — The long east-coast beach with the island's densest run of shops and rooms; strong the length of the back road, though in the evening rush a ride takes longer to arrive simply because everyone is ordering at once.
  • Lamai — The southern beach, quieter than Chaweng but still continuously built up; fine along the beach road, while a place up on the slope behind depends on whether it faces the sea or the hill.
  • Bophut — The old fishing village in the north with a single lane along the water; consistent, and a sensible base if you have calls, because it is near the main road without the churn of the big beaches.
  • The island's interior — Forested mountain with waterfalls and viewpoints, reached by narrow steep roads; long gaps with nothing at all in places, so do not plan on calling a ride back from up there.

Gite fuori città

  • The Ang Thong marine park — Boats leave early for a cluster of uninhabited limestone islands, and you will be outside coverage for most of the day. Warn whoever is waiting beforehand, and save the photos for the ride home.
  • Over to Koh Phangan and Koh Tao — Fast boats cross open water; the line goes in the middle and returns near the far pier. If you are heading for one of the beach gatherings that draw thousands, expect rides and messages to be slow that night.
  • The waterfalls and the inland roads — Up into the middle on narrow roads roofed by trees, with the line gone for most of the climb; download the map before you set off, and avoid going in rain, when the surface is slick and it darkens early.
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Connettersi in Koh Samui

Do the ferries change schedule often, and how would I know?+

Sailings shift with the sea state and the season, so no timetable holds all year. Check with the operator on the day of travel rather than relying on times you noted months ago. If you have an onward flight from the mainland, always leave a whole extra sailing's worth of slack, and keep the operator's contact saved offline.

Riding the ring road with the map open all day — is that expensive in data?+

Less than you fear: turn-by-turn voice guidance costs far less than watching video. What actually eats the allowance is reloading map tiles as you zoom in and out, and downloading the island beforehand makes that go away. Two other things worth preparing: a phone mount and a power bank, since the heat makes the handset run warm and the battery fall faster than usual.

My resort is on a small cove behind a headland — will the signal be enough?+

Usually enough for messages and maps, but not reliable enough for a camera-on meeting, because the rock headland blocks the direction the signal comes from. What works is testing in the room and on the balcony on day one and noting the best spot on the property. For anything important, come up to the ring road or a cafe on the main road — the difference is obvious.

A full day's diving with the phone left on the boat — what should I watch for?+

Two things. First, battery: a handset hunting for a signal out at sea all day drains far faster than on land, so turn mobile data off or use flight mode while you are offshore. Second, damp and salt — keep it in a genuinely waterproof bag, not just in a rucksack. Settle every arrangement ashore before you sail.