1&1 Switzerland Roaming 2026: Check Costs and eSIM Alternatives

Short answer: With 1&1, Switzerland is not part of the standard EU roaming list. Therefore, check your 1&1 terms and bookable international packages before you travel. If you primarily need mobile internet, a separate Switzerland eSIM from VoiSim can be the more stress-free solution, as it spares your German 1&1 contract from data roaming charges.

Switzerland is nearby, but in terms of mobile communications, it doesn't feel like a standard EU destination for many German contracts. This is often underestimated. You cross the border, Google Maps keeps running, WhatsApp updates photos, and suddenly data roaming isn't just a minor setting you toggled.

That’s why it’s worth doing a quick check with 1&1 before you head out. Not while on the train to Basel or just before the Gotthard tunnel, but ideally at home on Wi-Fi. This way, you’ll know whether your plan has a suitable package or if you’d prefer to use a travel eSIM for mobile data.

Is Switzerland included in 1&1's EU roaming?

According to the official 1&1 country list, the EU roaming regulation applies to many EU countries as well as several others like Iceland, Liechtenstein, and Norway. Switzerland is not on that main list. 1&1 lists Switzerland separately among the European countries where EU roaming regulations do not apply and for which international packages can be booked.

That doesn't automatically mean that any usage has to be expensive. However, it does mean: don't blindly rely on EU roaming logic. Before you travel, open your 1&1 Control Center or the 1&1 app to check the currently valid terms for your specific plan.

When does 1&1 roaming in Switzerland become impractical?

It becomes impractical whenever you need data for longer periods, not just for a quick check. Navigation in the car, public transport apps, hotel bookings, messaging, weather, tickets, music streaming, and map services consume more data than you realize while on the go. The tricky part, especially with short trips to Switzerland, is that you don't think of it like a long-haul trip, but rather like a quick excursion.

I would recommend taking a closer look at 1&1 roaming in Switzerland if you are staying for several days, want to use a hotspot, or need to be reachable for work. For a quick look at a message, many things are sufficient. For a full day of travel with maps and apps, a predictable data package is more relaxed.

1&1 international package or Switzerland eSIM?

A 1&1 international package can be useful if you want to keep everything within your existing contract and the terms fit your usage. A travel eSIM is a better fit if you want to keep your main SIM active but prefer for mobile data to run via a separate package.

The practical difference: your German SIM stays in the device for calls, SMS, or banking codes. The Switzerland eSIM handles mobile data. On many smartphones, you can configure this separately in the settings. Beforehand, however, you should check whether your device supports eSIM and does not have a SIM lock.

How to prepare your smartphone

It is best to install the eSIM before your departure while on Wi-Fi. Afterward, set which SIM should use mobile data. In Switzerland, activate data roaming for the travel eSIM, not blindly for every SIM in the device. This way, you stay in control.

At VoiSim, you will find several data packages on the Switzerland product page for different travel durations and usage types. The page also mentions technical details like supported networks and activation instructions. Check the options before purchasing so that the package matches your actual consumption.

Who is a Switzerland eSIM particularly suitable for?

A Switzerland eSIM is particularly useful for travelers who want to keep their data volume predictable. This includes weekend trips, family visits, road trips, business trips, or train journeys through Switzerland. Even if you are just passing through, mobile internet can be convenient for navigation and real-time traffic data.

It is less useful if you are almost exclusively using hotel Wi-Fi or if your 1&1 plan already offers a suitable package for Switzerland. That is exactly why checking your plan in advance is important. The eSIM is not a mandatory solution, but an alternative for greater control.

FAQ: 1&1 Switzerland Roaming and eSIM

Is Switzerland included in 1&1's EU roaming?

Switzerland is not on the official 1&1 list of countries covered by the EU Roaming Regulation. 1&1 lists Switzerland separately as a country for which international packages can be used. Always check the specific status of your individual plan, however.

Can I use 1&1 and a VoiSim eSIM at the same time?

On many eSIM-capable smartphones, yes. Usually, your 1&1 SIM remains active for calls and SMS, while the VoiSim eSIM provides mobile data. The exact setting depends on your device.

Does the VoiSim Switzerland eSIM have a phone number?

No. The Switzerland eSIM is intended for mobile data. WhatsApp, iMessage, Maps, and many travel apps will continue to work via data, but classic telephony does not run through a new Swiss number.

When should I install the Switzerland eSIM?

It is most convenient to install it before your trip while on Wi-Fi. According to the product information, usage only begins once the eSIM connects to the network and data roaming is active.

My conclusion

If you use 1&1 in Switzerland, don't wait until you're at the border to check the roaming conditions. Switzerland is a special case compared to standard EU roaming. For anyone who needs reliable data on the go, a separate Switzerland eSIM is a clean alternative: keep your main contract, plan your mobile data, and worry less.

Go to the VoiSim Switzerland eSIM