Many travellers assume a home plan behaves in Switzerland the way it does in France or Italy. It does not. Switzerland and Liechtenstein fall outside EU roaming rules, so data can be billed per megabyte.
Check your Europe bundle too
Not every Europe eSIM bundle includes Switzerland. Always check the country list before buying, especially for an Alsace, Switzerland, northern Italy road trip. A bundle without Swiss coverage leaves you with no data or expensive roaming.
Coverage in the mountains
Swiss networks are among the best in Europe. Zermatt, Verbier, Interlaken, Lucerne and the rail routes generally have 4G or 5G. Deep valleys, tunnels and high pistes can drop out, so download your piste map and rail ticket offline.
How much data
- Weekend in Zurich or Geneva: 1 to 3 GB
- Ski week with navigation and photos: 5 GB
- Work trip with hotspot: 10 to 20 GB
Practical
Install the profile at home on wifi. If you cross several countries, a Europe bundle that includes Switzerland is usually cheaper than separate bundles. Enable battery saving on the slopes, because searching for signal drains power.