Communicate for free using a single app. Phone, chat, send pictures or videos and much more. Make free unlimited phone calls to the Swiss fixed and mobile network – even from abroad. Your privacy is protected, thanks to secure data storage on Swisscom servers in Switzerland.

A single app for all your communications:
- Free phoning and texting to other iO users
- Unlimited chatting with other iO users
- Invite up to 100 friends to a group chat
- Sharing of pictures, videos, locations, contacts and more with other iO users

Make «iO Out» calls free of charge:
- Call practically any number in Switzerland, Europe, Canada or the United States *
- Texting to all of your worldwide contacts who don’t yet have iO *

Call Switzerland free of charge:
- Unlimited phone calls to the Swiss fixed and mobile network – even from abroad *

Protect your privacy:
- No use is made of your personal address book
- Communication is secure and encrypted
- All sensitive data remain in Switzerland

Note:
- To use iO, you need to have an Internet connection via WLAN or a mobile data network (3G/LTE).
- The Internet connection is not included and usage may incur additional costs.
- An Internet connection via a mobile data network (2G/3G) may result in impaired voice quality, especially at train stations, on trains or in cars.


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*) Free for Swisscom Natel infinity & Natel light (flat rate Switzerland only) customers only