UniFon

All you need to do is download the free app on your mobile device, connect to the Internet (WiFi or 3G), and start using this simple app that will spare your home budget.
By using UNIFON, you have your landline on the go - you can receive and make calls on your mobile phone, and pay the regular call price you are currently paying for your SBB / Telemach landline.
The UNIFON app enables you to keep in touch with your contacts from the UNITED GROUP network without charge.
You’re travelling abroad and want to avoid high call costs? UNIFON lets your receive and make calls in roaming at prices that you pay when you’re home. All you need to do is connect to the available WiFi network.
Activating the app is very simple - download the app on your mobile device, log in with your username and password from the self-care portal Moj SBB / Moj Telemach, and enjoy this useful and cost-saving app!
The app can be activated on up to five devices per household, and it can be used by all SBB / Telemach landline customers.