Calls not connecting while WIFi calling is on. (UK)

[Hudz]

I have an S25 Ultra runing latest software as of 25/04/25. I've noticed but cannot pinpoint exact time the issue started. I have no coverage issues with my network (EE) and never had issues with my broadband provider for 3 years (4th Utility).

The Issue:

So I'm abe to make and receive calls when WiFi calling is disabled as expected. When WiFi calling option is on and im currently connected to the network (EE) I still continue to connect and receive calls normally. But the moment I'm connected to a WiFi be it at home or at the hospital, making a call gets hung up immediately. If someone tried to call me call would not go through. 

I've contacted EE they have confirmed they have a record of my calls failing to connect with WiFi calling. They verified all my account (Esim) settings are correct and WiFi calling should be expected to work normally. I've found starting a call on the network then switching on the WiFi during the call the phone would switch over to WiFi calling perfectly fine, so it seems to me its the initial connection that's causing the issue?

WiFi calling is a feature I use a lot since I do spent a lot of time in and out of hospital where network connections are usually bad. I'm wondering if anyone using this feature has had any issues or if anyone not using the the feature on the same network as me could test to see if they have issues. 

For now I've just disabled the WiFi calling setting since its an easy workaround the issue for now. I do plan to walk into an EE store and switch back to a physical SIM incase that may change something. 

Looking forward to see what you think 🤔. Might be something I've missed or not tried yet. I thought I'd mention incase its important I have also recently purchased a SIM plan for my Samsung Watch Ultra.

I appreciate any advice thank you for reading. 

[arianwen27]

Open the settings for wifi calling (hold your finger on the icon), set it to wifi preferred.

To explain a little bit, wifi calling actually sets up a vpn to your cell provider, if your home network or something along the way goes wrong, that can cause issues. You should see the wifi calling icon in the top bar if it's working, no icon means it isn't working. Though if it doesn't connect it should default back to normal calls, not break calling

[Hudz]

I have tried both options won't work. It doesn't change to mobile data it just refuses to make or receive calls while on a wifi connection. It shows me the wifi calling icon too. No idea whats going on.

[arianwen27]

Do you see the icon for it or not?

If it's showing but not working is 1 thing.
If it's not showing and calls still aren't working is equally strange

[Hudz]

I see the icon yes. You just said the same thing twice.

[arianwen27]

I don't believe I am. I said if the icon appears, that means it believes it has connected, but somehow isn't working.

If the icon wasn't there, that means the phone has detected a problem and knows it won't work.

You seeing the icon means the phone believes it is connected and working. Which makes this a little more complicated

[Hudz]

Yeah I'm hoping I'll get a solution or answer here.

[smiley]

This sound very strange. I rely also on WiFi calling at work, as our screened buildings have a very poor cellular in most of the locations of the office.

But I personally haven't had any such behaviour that you describe.

Sorry, this isnt a solution, but just to validate that for my S25u in a similar circumstance and my WiFi calling works just fine.

For info I use IDmobile on the three network.



Just as a side note, and maybe drastic action perhaps... but sim only cards with no tie in (30 day rolling) can be got for virtually no costs these days... I.e. a £5 one month... if you feel the need to debug your network with a dual sim test. Depending on which you choose you could consider a voxi (vodafone), id (three), or another for a cheap test. It might also give some facts to EE if you do find that another network WiFi calling works without the connection issues. Just a thought.

Like you say.. it isnt a coverage issue... but maybe the network is having some problems establishing the connection in the first place.

Smiley

[weskerevil]

I left ee for the same problem on 1p mobile now uses ee masts and WiFi calling and network signal is spot on 😊

[Hudz]

Thank you if it comes to it I'll definitely do your test. Thanks for the suggestions.