Short answer: Swisscom runs the best mobile network in Switzerland and charges accordingly. A week of unlimited data is around CHF 20, a month around CHF 65, and you will hand over your passport to buy it. Switzerland is also the country where more travellers get an unexpected bill than anywhere else in Europe, for a reason that has nothing to do with Swisscom: Switzerland is not in the EU, so EU and UK roaming allowances stop at the border.
This guide covers what Swisscom actually charges, the identity check Swiss law requires, why so many "Europe" plans quietly exclude Switzerland, the border geography that causes accidental roaming in both directions, and when a travel eSIM is the cheaper tool.
What Swisscom costs
Swisscom's prepaid flat packages are simple and openly priced. Unlimited data in Switzerland at up to 50 Mbps, plus unlimited domestic calls and outgoing SMS:
- CHF 20 — 7 days (roughly $25)
- CHF 40 — 15 days (roughly $50)
- CHF 65 — 30 days (roughly $81)
- CHF 150 — 90 days (roughly $186)
There is also a pay-per-day option at around CHF 2 for unlimited data, which suits a short stay better than the weekly flat rate if you are here for two or three days.
Set against the carriers we have covered elsewhere, these are high numbers. Twenty-five dollars for a week is roughly what a month costs in South Africa and about ten times what a week costs in Nigeria. That is Switzerland, not Swisscom being unreasonable: everything here costs what it costs.
What you get for it is real. Swisscom's network is genuinely excellent, including in places where mountain coverage usually collapses. More on that below, because it is the honest counterweight to the price.
Identity verification is required
Since 2023, every Swiss SIM — prepaid and postpaid alike — must be registered against a verified identity. There is no anonymous prepaid market in Switzerland.
In practice that means:
- Buying in a shop: bring your passport. Staff take a copy and register the line against your name and passport number.
- Buying online or in-app: the check is done by ID photo upload or a short video verification instead.
Neither is difficult. Both are a step you complete before the line works, and the shop version is a queue after a flight. As paperwork goes this is far lighter than Ghana's 30-day cliff or South Africa's proof-of-address requirement — it is a verification, not an obstacle.
The mistake that actually costs money: EU roaming stops at the border
This is the section to read even if you buy nothing.
Switzerland is not in the European Union, not in the EEA, and not covered by the EU's Roam Like at Home rules. A German, French, Italian or Spanish plan that roams freely across the EU does not roam freely in Switzerland. Neither does a UK plan, and UK travellers are doubly exposed because several UK networks reintroduced EU charges anyway.
What that looks like on a bill: daily roaming add-ons in the €5–€15 range, or pay-per-use rates that are measured per megabyte rather than per gigabyte. A weekend of ordinary phone use on pay-per-use rates is how people end up with three-figure bills from a two-day trip.
It catches people because the geography feels continuous. You take a train from Milan to Zurich, or drive from Munich to Zurich, and nothing announces the change except a text message you may not read.
Many "Europe" eSIM plans exclude Switzerland too
The same non-membership trips up eSIM buyers. A large number of Europe-wide plans are built on EU regulatory coverage, which means Switzerland is either missing from the country list or carries a surcharge.
Worth checking before you buy, whoever you buy from. Our own Europe regional plan covers 41 countries including Switzerland from $1.35, but the point stands generally: open the country list and look for Switzerland by name. Do not assume "Europe" means Europe.
Border towers work in both directions
Switzerland's borders are unusually intricate and this has practical consequences.
- Geneva Airport has a French sector, and the airport sits directly on the border. Phones there routinely latch onto French networks.
- Basel sits at the corner of Switzerland, France and Germany, with an airport shared between two countries. Signal crosses freely.
- In border valleys and lakeside towns, the strongest tower is frequently the one on the other side.
The consequence runs both ways. A Swiss plan can find itself on a French tower and bill you as roaming. An EU plan can pick up a Swiss tower while you are still in France or Germany, and bill you at Swiss rates for a country you are not standing in.
The fix is unglamorous and effective: on your home SIM, turn data roaming off entirely and select the network manually if you see odd behaviour. Whatever plan you are using for data, let it be the only line with data enabled.
Coverage: the price buys something real
Most countries with mountains have terrible mountain coverage. Switzerland does not, and it is worth saying clearly because it is the strongest argument for a local plan.
Swisscom delivers 4G and 5G across the country including alpine valleys, most major ski areas, cable car stations and mountain restaurants, and the rail network. Swiss trains — including long tunnel sections — are far better covered than trains in the UK, France or Italy.
The gaps that remain are the ones physics imposes: high off-piste terrain, deep side valleys, hiking routes away from lifts and villages, and the interior of the longer road tunnels. If you are ski touring or hiking beyond the marked network, download offline maps and treat connectivity as a bonus. That advice applies to every network here, including the best one.
Salt and Sunrise are both good and generally cheaper. In cities and main valleys the practical difference is small. In high alpine areas Swisscom is still the one that works most consistently, which for a ski or hiking trip is worth a premium — for a city break in Zurich or Geneva it is not.
What it costs to just have data
Cellesim Switzerland eSIM plans start at $0.95, install with one tap and connect on landing. Every active plan includes a free VPN, useful on hotel and mountain-restaurant Wi-Fi.
The comparison here is unusually lopsided, so let us be precise about where each option wins.
A travel eSIM is clearly cheaper for a city break, a few days of skiing, a business trip, a conference in Zurich or Geneva, or any itinerary where Switzerland is one stop in a wider European trip. You are not paying CHF 20 for unlimited data you will not exhaust.
Swisscom is the better buy if you are here for several weeks, if you need a Swiss phone number, if you are working remotely and moving serious volumes of data, or if you are spending your time high in the mountains where Swisscom's coverage edge is real rather than theoretical.
The trade-off is the same one we state in every guide: a travel eSIM does not give you a Swiss phone number. Data only. If you need to receive Swiss SMS for a domestic service, buy a local SIM.
How much data will you actually use?
Rough hourly figures for planning:
- Maps and navigation — around 5 MB per hour of active guidance
- Messaging and email — a few MB a day
- Social media — 100–150 MB per hour, more with autoplay
- Video calls — 500 MB to 1 GB per hour
- Ski and hiking apps — modest while running, but photo and video backup is not. Set backup to Wi-Fi only.
A four-day city trip on maps and messaging rarely passes 1 GB. A week of skiing with route tracking, weather checks and a reasonable amount of social media lands around 2–4 GB. Remote work with daily calls is 10–20 GB, which is precisely the point where Swisscom's unlimited flat rate stops looking expensive.
How to install an eSIM, whichever one you choose
- Check your phone is eSIM-capable and carrier-unlocked. A locked handset will accept the profile and then refuse to connect.
- Install over Wi-Fi — at home before you fly, or on airport Wi-Fi. The eSIM cannot install itself without a connection.
- Scan the QR or use one-tap install. iPhone: Settings → Mobile Service → Add eSIM. Android: Network & Internet → SIMs, path varies by manufacturer.
- Label the line "Switzerland data" so you can tell profiles apart.
- Set the data line and turn data roaming off on your home SIM. In Switzerland this step is not housekeeping, it is the difference between a normal bill and a bad one.
Failed installs are nearly always one of four things: a carrier-locked phone, no Wi-Fi during install, a single-use QR already used, or a handset variant with eSIM disabled. Our eSIM compatibility checker rules most of that out in seconds.
Frequently asked questions
Does my EU roaming work in Switzerland?
No. Switzerland is not in the EU or the EEA and is not covered by Roam Like at Home. Your EU allowance stops at the border and roaming charges apply unless your operator has a specific Swiss add-on.
What about a UK plan?
Switzerland was never included in UK operators' EU roaming arrangements, and several UK networks have reintroduced EU charges besides. Expect a daily add-on of roughly £5–£12, or per-megabyte rates if you have no add-on at all.
Do Europe eSIM plans include Switzerland?
Many do not, because they are built around EU coverage. Always open the country list and look for Switzerland by name before buying. Our Europe plan covering 41 countries does include it.
Do I need my passport to buy a Swiss SIM?
Yes. Since 2023 all Swiss SIMs require verified identity. In a shop that means a passport and a copy taken at the counter; online it is usually an ID photo or a short video verification.
Is Swisscom worth the price?
In the mountains, often yes — its alpine and rail coverage is the best in the country. For a city trip to Zurich, Geneva or Basel, Salt, Sunrise or a travel eSIM will serve you just as well for far less.
Why did my phone connect to a French network at Geneva Airport?
Because the airport sits on the border and has a French sector. The same happens around Basel and in border valleys. Turn data roaming off on any line you do not want billing you, and select the network manually if it keeps jumping.
Is there mobile signal on Swiss trains and in ski areas?
Generally yes, and notably better than in most of Europe. Main lines, tunnels, major ski areas, cable car stations and mountain restaurants are well covered. High off-piste terrain and remote side valleys are not.
How much data do I need for a week in Switzerland?
Sightseeing and messaging with hotel Wi-Fi: 1–2 GB. A ski week with tracking apps and social media: 2–4 GB. Remote work with video calls: 10–20 GB, and at that level an unlimited local plan is the better economics.
Can I keep my own number while in Switzerland?
Yes, on any dual-SIM phone. Keep the home SIM for calls and bank verification codes and run data on the eSIM. Turning data roaming off on the home SIM matters more here than almost anywhere.
Will my phone work with an eSIM?
Most phones released since 2018: iPhone XS and later, Google Pixel 3 and later, Samsung Galaxy S20 and later, and many mid-range models since. The handset must also be carrier-unlocked.
Planning the trip? Compare data plans on our Switzerland eSIM page, install in one tap before you fly, and land online. Free VPN included.
