Whether or not Wi-Fi calling works depends on the software and device (mobile phone).
Regarding the software:
It could be that your device's software is not Swiss or Europe specific. There is a distinction between the software of the device manufacturer (e.g. Samsung) and the software of the operating system manufacturer (e.g. Android). Wi-Fi calling cannot be activated if the device manufacturer's software is not Swiss or Europe specific.
Here is how you can find out if your device is Swiss or Europe specific or not:
- Enter the following number combination into your phone: *#1234#
- Read on your screen whether the software version is Swiss or Europe specific.
Samsung Galaxy S6 & S7
- AUT stands for Switzerland
- ATO stands for Austria
- DBT stands for Germany
Samsung Galaxy S8 and newer
- OXM stands for Europe
Would you like a Galaxy S6 and S7 device software that is optimized for Switzerland? Proceed as follows:
A software change invalidates the device's warranty. Bring the device into a Sunrise shop, and we will take care of the software adjustment.
Attention: Because the device is returned to factory settings during the software update, we urgently recommend that you back up all your data and settings on a private memory device beforehand. The entire process takes approximately five workdays. You will incur the following charges:
- CHF 0.00 for devices that you have acquired directly from Sunrise.
- CHF 50.00 for devices acquired from a middleman.
A replacement device cannot always be provided.
Regarding the device:
All Wi-Fi calling-capable devices can be found under Wi-Fi Calling