Options & Services WiFi-Calling

Wi-Fi Calling: calling over Wi-Fi.

With Wi-Fi Calling, you can make calls on any Wi-Fi in the world, whether in your home, hotel or office. You simply use the included services of your subscription as if you were in Switzerland. No roaming fees and no app. We recommend using Wi-Fi Calling especially when the mobile network coverage is not optimal, for example indoors.

All you need is a mobile phone that supports this function and you have to activate Wi-Fi Calling one time on the device. To ensure that the phone does not connect to the mobile network, we recommend turning on flight mode first and then activating Wi-Fi.

*Exception: If your subscription includes roaming calls but no international calls (from Switzerland to abroad), and you make a Wi-Fi Calling (VoWiFi) call from abroad, it will be charged as an international call. In this case, it is recommended to make your call via the mobile network. 

No additional costs

The function Wi-Fi Calling is completely free and also works with PrePay contracts.

No roaming fees*

For incoming and outgoing calls and SMS, you use the included services of your subscription as if you were phoning in Switzerland.


Your smartphone searches automatically for the best Wi-Fi network for your calls.

Quite simple without an app

Neither you nor the person you are calling needs to install an app. Wi-Fi Calling works with all mobile and landline numbers worldwide.

No data usage

You don't use any data volume as you are connected via Wi-Fi.


Salt guarantees the proper functioning of Wi-Fi Calling on smartphones purchased directly from Salt, i.e. in Salt Stores, in the Salt online store or via our customer care. Wi-Fi Calling is generally not supported on prepaid smartphones of certain manufacturers, regardless of the sales channel. You can find a list of all Wi-Fi Calling compatible devices here.