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Roaming: mobile services abroad

On this page:
Stay in touch while abroad, travelling or in border areas, use your roaming days and manage costs.

Subscription specifics

Even abroad you are always reachable under your mobile number. You can call, send SMS and surf the Internet as usual. 

Check the benefits of your subscription by country:

Don't know your mobile subscription? Check your subscriptions on My Swisscom.

If you are abroad, you can make phone calls, send SMS and go online as usual. If you want to use data roaming (e. g. for surfing the Internet), check your smartphone settings if data roaming is switched on.

Using prepaid abroad

You can also use your prepaid mobile phone to make calls, send SMS messages and surf the Internet in most countries. Rates vary by country. We recommend that you check them before you leave for your trip:

If you use your prepaid phone frequently abroad, it may be worthwhile to buy a data package or a Travel Voice Option.


There is a charge for accessing the COMBOX®. Our recommendation: Switch off the COMBOX® when travelling abroad.

New inOne subscriptions for use abroad

Use abroad

With the inOne mobile basic, go and premium subscriptions for private and business customers, there are no limits on your communication while travelling.

  • inOne mobile basic, for example, offers unlimited calls and SMS/MMS in the EU / Western Europe. It includes a 3 GB monthly data allowance for surfing in Switzerland/the EU/Western Europe.
  • inOne mobile go offers unlimited surfing and calls throughout the EU/Western Europe.
  • The inOne mobile premium subscription offers unlimited surfing and calls in 100 countries worldwide.

In which countries can I enjoy unlimited use of inOne mobile premium?

Which additional options and packs can I buy for use abroad?

How does Swiss mobile flat work abroad?

International calls

If you regularly make calls from Switzerland to other countries, it is worth adding the International Calls option, unless you have inOne mobile premium, which already includes calls from Switzerland to the EU/Western Europe and the USA/Canada. If you regularly make calls from Switzerland to other countries, it is worth adding the International Calls option.

What are roaming days?


Roaming days in EU/Western Europe Andorra, Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Faroe Islands, Finland, France, Germany, Gibraltar, Greece, Guernsey, Hungary, Iceland, Ireland, Isle of Man, Italy, Jersey, Latvia, Lithuania, Luxembourg, Malta, Monaco, Netherlands, Norway, Poland, Portugal, Romania, San Marino, Slovakia, Slovenia, Spain, Sweden, United Kingdom, Vatican City State

Residential customers with inOne mobile XS-XL or NATEL infinity 2.0 subscriptions and SME customers with inOne SME mobile XS-XL or NATEL® infinity 2.0 business subscriptions have a certain number of days included in their mobile subscription. During those days they can use the Internet, make phone calls and send SMS messages in the EU/Western Europe at no additional cost.

You can check your roaming day balance in the Swisscom Cockpit at


You have an inOne (SME) mobile M subscription

If you have an inOne (SME) mobile M subscription, you can write SMS, make phone calls and surf for 6GB during 60 days in the EU/Western Europe at no extra cost. If you use your roaming days and 6GB data allowance at different speeds, one of the following can happen:

Example 1: You have used up the 6GB data allowance before using the 60 roaming days:

Example 2: You have purchased a data package. Two days later your subscription is renewed:

Roaming outside of EuropeThe inclusive units apply to all countries outside the EU/Western Europe. With the exception of: Afghanistan, Angola, Bahamas, Belize, Bhutan, Burundi, Cuba, Djibouti, East Timor, Ethiopia, French Polynesia, Guam, Liberia, Libya, Mali, Nepal, New Caledonia, Zimbabwe.

The roaming days cannot be used outside the EU/Western Europe. If you have an inOne (SME) mobile XS - L subscription, you have 1000 SMS/MMS per month and 100MB per year included in your subscription. If you want to use the internet or make phone calls outside Europe, we recommend that you buy a data package and/or use the Travel Voice Option for cheaper phone calls.

Validity of roaming days

  • Roaming days are valid from the start, down/upgrade or renewal of your mobile subscription and are automatically renewed after 365 days.
  • A roaming day is deducted when you make or receive a call, or receive an SMS, send or receive an MMS, use data traffic (e. g. surf the Internet or send e-mails)
  • Roaming days are charged by calendar day in Swiss time and end midnight (UTC+1/ summer time applies).

Swiss border region

Close to the Swiss border, your mobile phone may automatically connect to the mobile phone network from a neighbouring country – for example the German “Deutsche Telekom” or Austrian “A1”.

Unnoticed, this automatic carrier switch can generate unnecessary roaming charges.


Therefore, we recommend that you switch off the automatic network selection in the Swiss border area.


To the manual


Cost control and COMBOX®

You can check your current usage for surfing abroad at any time via the Swisscom Cockpit. The current usage for phone calls and messages are shown on My Swisscom with a delay.

Free use of the COMBOX®

COMBOX® message within Europe is always free for inOne mobile customers.

Listening to the COMBOX (+86) within the roaming days is free of charge. After this, listening to the messages will be charged according to the standard tariffs. Prepaid and inOne mobile light customers will be charged in any event.

Avoid costs for using the COMBOX®

If you use your COMBOX® outside of Europe, increased costs may be incurred or roaming days may be charged: If you do not accept a call and the COMBOX® switches on, an incoming connection and an outgoing connection (for accepting the call through COMBOX®) will be charged.

That is why we recommend switching off call forwarding on your COMBOX® while travelling:


  1. Open the cockpit at
  2. In the menu, click on "Call settings".
  3. Under “Incoming Call Forward”, select the options “If Busy”, “If No Reply” and “If Not Reachable”.
  4. Click on "Save".


What is roaming?

Why can't I go online?

How can I go online abroad without wasting money?

How can I make cheap calls when I am abroad?

How much does it cost to send or receive SMS abroad?

Can I make calls abroad via a WLAN access (so-called Wi-Fi calling)?

I was charged for roaming even though I wasn't abroad. Why?



Do you have questions concerning our products?

We will help you via telephone or chat.

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