Well, not fulfilling the requirement is a bit far-fetched. They wanted to tell me that the Lumia 950 generally cannot do WiFi calling. Then you have to tell them that it’s actually their fault that it doesn’t work. My request now appears to be with the product manager. Let’s see what happens next…

Yes, some people don’t know much about it. There are pictures online that show you how to switch the function on/off. I agree that Swisscom will not be able to make the device WiFi calling capable; the device would be very capable.

I once had a very stubborn aunt on the line. She claimed that the device couldn’t do it, that I, that Swisscom didn’t want to, and that actually went back and forth a few times - both exasperated and emphatic.

The Windows mobile phone operating systems support unencrypted telephone calls over IP data networks with SIP/RTP. Perhaps for security reasons (=> very poorly) Swisscom only supports telephone calls over external data networks (e.g. Wifi/WLAN) with SIP/RTP if these telephone calls are routed from the mobile phone through a secure, encrypted VPN tunnel. Windows 10 Mobile’s native VPN client does not support a VPN tunnel with “normal” IKEv2/IPSec.

That’s why the “stubborn aunt” from Swisscom was (probably) right: Current Windows mobile phones do not support WiFi calling (VoWLAN) via a VPN tunnel.

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@GrandDixence wrote:

The Windows mobile phone operating systems support unencrypted telephone calls over IP data networks with SIP/RTP. Perhaps for security reasons (=> very poorly) Swisscom only supports telephone calls over external data networks (e.g. Wifi/WLAN) with SIP/RTP if these telephone calls are routed from the mobile phone through a secure, encrypted VPN tunnel. Windows 10 Mobile’s native VPN client does not support a VPN tunnel with “normal” IKEv2/IPSec.

That’s why the “stubborn aunt” from Swisscom was (probably) right: Current Windows mobile phones do not support WiFi calling (VoWLAN) via a VPN tunnel.

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???

The native VPN client certainly supports IPSec & IKEv2.

And at least via ETH-VPN with L2TP/IPsec VPN works perfectly and the Swisscom TV air 2 app also works perfectly abroad with VPN during the holidays.
Last used successfully in Ireland at the end of July…

Addition: I own a Swisscom branded Lumia 950XL

@All

The technology may be one thing, but false information (in writing) and on the Internet is another. This misleads customers and then has to spend hours ironing out Swisscom’s mistakes. Only devices for which Swisscom can guarantee the guaranteed functions belong on the list and in the event of errors (everyone makes them and that’s legitimate) you just have to be accommodating.

I would say that the effort is no greater than for iPhone/Android.

However, because of the lower distribution, Swisscom sets its priorities differently…

@Googlook

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@Googlook wrote:

WiFi calling is expected to be activated by Swisscom for Windows 10 Mobile devices in the next few weeks.

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\==> Where did you get this information?

Doesn’t that seem to be the case?

@speed85

No, that was already the case. On June 24, 2016, the device was listed as Wi-Fi capable and was advertised and sold as such by the shops. Users report that it suddenly stopped working after updates. Swisscom was convinced at times that it would work with the device (I was later told that it would generally work with Win Mobile devices).

It is interesting that providers in other countries have activated it without any problems.

Swisscom’s product management seems to be taking its time. Or has anyone heard anything?

@schnyders

Yes, that is true; I called again today and requested that they let me know today. After all, the ordeal has been going on for more than 2 months…

@All

My problem was solved when Swisscom bought my device or replaced it with a different type. Done for me. ATTENTION: In the current brochure, various devices are stated as being capable of WiFi calling, although they do not meet this requirement. Be careful when buying and ask the technical service via the hotline.

Probably not a solution for me. How much do you still pay for your phone?

@schnyders

At the new price, the device is also new and was only sent in for repairs. There is a difference payment for the replacement device; Swisscom was generous!

I have effectively given up on Wifi Calling.

The 950 still appeals to me. Preferably the Dual Sim. But this is only available without Swisscom branding. But I want VoLTE.

Can anyone say from personal experience whether VoLTE now works over brand-free devices. Dual or single sim?

@feealf which phone did you choose? Somehow I don’t think any of the current supporters would appeal to me. Android should be a Nexus device, it doesn’t want all the garbage from the manufacturer on it. And iPhone, well I don’t know. I once had a 3GS, it became slower with every software update.

@schnyders

I carry out tests for customers and therefore work with several devices. Based on the tests so far, only the iPhones work without any problems, with a good WiFi connection being preferred over a poor cellular connection. This prioritization cannot be set at Swisscom, which is why manual intervention is necessary for Samsung devices (airplane mode=on/WLAN=on). If you forget to turn this off, you will no longer be reachable outside of WiFi coverage.

Foreign providers offer the option to set the priority (mobile or Wi-Fi). I’ll do the next tests with a Sony Xperia X.

The Lumia 950 is currently being advertised as being capable of WiFi calling again on the SC homepage.

And funnily enough, only the 950, not the 950 XL…