Destinations
eSIM for Italy: trains, tunnels and tickets
In the EU, on the euro, three networks. Nobody warns you how much of the fast train to Florence runs underground.
Photo: Timothy A. Gonsalves, CC BY-SA 4.0
Italy is easy in the sense that it is in the EU and on the euro, so an eSIM works there without any ceremony. What stops it being simple is the shape of the country: a thousand kilometres from the Alps to Sicily, and a trip almost everybody makes by train.
And the train is where Italian coverage actually reveals itself.
Which networks you get
Our plans use TIM, Vodafone, Wind Tre and iliad. Your phone takes the strongest and moves between them on its own.
Cities and the plains are densely covered — Rome, Milan, Florence, the whole Po valley. The difference shows where Italy is vertical: across the Apennines, in the Dolomites, along the Amalfi road squeezed between rock and sea, and on Sardinia away from the main roads. There, one network holds and another does not.
Trains, tunnels, and why your call drops
The fast trains between Rome, Florence and Milan spend a great deal of the journey inside tunnels. The connection does not fail because the plan is poor; it fails because there is a mountain overhead.
On the Rome–Florence line a good share of the route is underground. No network fixes that, and a video call from the train is a matter of luck.
What works: messages catch up between tunnels, and maps work if they were downloaded. What does not: streaming, video calls, and loading a ticket while moving.
Practically — download your train ticket before you leave. Trenitalia and Italo scan a code and do not care whether it loaded. The same goes for timed museum entries: the Uffizi, the Colosseum, the Last Supper. All of them are better in your photo library than in your inbox.
If you are coming from the EU
You may need nothing. Check your fair-use cap and what happens past it — some operators slow you down, others charge per megabyte.
If you are coming from outside the EU
Serbia, Bosnia, the UK, Switzerland — nothing protects you and Italy is full-price roaming. Switzerland deserves its own note: if you enter Italy by train or car through Switzerland, that is a third country and a third bill, charged separately for the stretch you spend in it.
How much data
A week around Italian cities — maps, messaging, tickets, translation, photos — fits in 3 to 5 GB. What pushes it up:
- Photos backing themselves up. People take more pictures in Italy than almost anywhere. Set backup to WiFi only before you go — the single biggest saving available.
- Museum audio guides. Many are an app you download on arrival, inside a building with thick walls and a poor signal. Get them the night before.
- Navigating old town centres. Narrow streets confuse GPS, so the map works harder than it would in the open. An offline map settles it.
North, south and the islands
Coverage is best in the north and along the coasts. It thins inland in the south and in the interiors of Sicily and Sardinia, but stays perfectly usable on the roads. What genuinely struggles are the mountain valleys of the Dolomites, where the signal can stop at the mouth of the valley.
If you are hiking, download the trail map. That is true of any mountain range, but it is easily forgotten in Italy precisely because everything worked flawlessly an hour earlier.
Setting it up before you go
- Install at home on WiFi and leave the line switched off.
- Leave data roaming off until you arrive — a plan counts from its first connection, not from payment.
- On arrival, turn the travel line on and switch data roaming on for that line only.
- Keep your own number on for calls, with its data roaming off.
Mistakes worth avoiding
- Counting on train WiFi. It exists, and it works exactly as well as the network above the tunnel does.
- Leaving a museum ticket in your inbox. Save it to your photos.
- Forgetting Switzerland if you are coming overland from northern Europe.
- Turning everything on as you land. The meter starts before you have collected your bag.
Short answers
Does it work on the train? Between tunnels yes, inside them no. No plan changes that.
Do I get an Italian number? No. The eSIM carries data; your own number stays yours.
Does it cover Sicily and Sardinia? Yes — both are Italy, served by the same networks.
Does my EU plan work? Yes, up to your fair-use cap — check what it is.
Can I tether? Yes.
