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

通信自由使用单一的应用程序。电话，聊天，发送图片或视频等等。拨打免费无限制电话给瑞士的固定和移动网络 - 甚至来自国外。保护您的隐私，这要归功于固定在瑞士的瑞士电信服务器的数据存储。

您的所有通信的单一的应用程序：

- 免费中打电话和发短信给其它IO用户

- 与其它IO用户聊天无限

- 邀请多达100个朋友加入群聊

- 的图片，视频，位置，联系人共享以及更多其它IO用户

让«供氧出»通话免费：

- 呼叫几乎任何数量在瑞士，欧洲，加拿大或美国*

- 发短信到你所有的全球联系的谁还不具备供氧*

瑞士呼叫免费：

- 无限打电话给瑞士的固定和移动网络 - 甚至从国外*

保护您的隐私：

- 不使用由您个人通讯簿

- 通信安全和加密

- 所有的敏感数据留在瑞士

注意：

- 要使用供氧，你需要有通过WLAN或移动数据网络（3G / LTE）的Internet连接。

- 互联网连接不包括与使用可能产生额外的费用。

- 通过移动数据网络（2G / 3G）的Internet连接，可能会导致受损的语音质量，尤其是在火车站，火车上或汽车。

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只有*）免费为瑞士电信Natel无限＆Natel光（平率只有瑞士）的客户