Wi-Fi calling keeps failing

[VDisappointed]

My wife and I are both on Three. I have an iPhone SE2 and she has an iPhone 15 pro.

We use Cambridge Fibre as our ISP.

The Three signal isn’t good enough in our area to get good reception indoors (or outdoors quite often) so we use WiFi calling at home. Until earlier this year it worked very well.

A few months ago we simply stopped getting calls and couldn’t make them. Calling out we got nothing. People calling us heard a ringing and then it went to voicemail. 

We contacted Cambridge Fibre who told us that this was a known fault between Apple, Three and Vodaphone. There is a workaround: turn Wi-Fi off and on. This usually works but means that we often miss incoming calls because we haven’t reset it after another call.

Three were useless. They told me to turn off Wi-Fi calling and use 4G. Theydidn’t seem to understand that then we wouldn’t get anything.

The obvious solution is to change network but we still have some months left on our contracts.

Has anyone else experienced this? Do you have a better solution than “turn it off and turn it on again”?

Thanks in advance.

[Mr_Dissapointed]

I've had the same issue, I have been on the Three network for years and always had to use wifi calling due to the terrible cell signal at my home address (south London). It never got better with the introduction of 4G then 5G. I have a iPhone 13 and not had issues with the wifi calling until earlier this year.

When at home and the wifi calling is on I cannot make or receive calls. There is no tone or anything. Callers hear a ringing tone but my phone does not ring (tested by multiple different callers).

I have contacted Three and they sent me a new sim card to see if that made a difference.......it didn't!!

 I contacted Community Fibre and got no help. apparently escalated to a higher technical team but still had no reply back. 

I'm now convinced the issue is with the Community Fibre broadband/Three combination. My wifes iphone with O2 works with the wifi calling.  I have connected to other broadband/ wifi services at family and friends homes and there is no issue. 

[Rosabella]

I have the exact same issue as you with 3/Community Fibre/iphone13.

logged issue back in July and 3 sent a new sim and to try Apple if it didn’t work. Apple said nothing wrong. Tried CF who said it was a ‘known issue’ between them and 3 and it would be escalated. Heard nothing. 
went back to 3 who sent me back to CF. CF now blaming it on 3 and doing nothing further. This has been ongoing since that major 3 outage in June so I feel like something happened then which affected the WiFi calling. 

anyway, clearly no one is going to take responsibility and it’s likely a joint fix between them is needed. The only option as I see it is to either cancel your 3 contract or CF when it comes up for renewal.

in the meantime I have disabled WiFi calling but like you, reception in south London is appalling so this temporary fix is not ideal nor viable long term !

[PeteG]

Hello. 

Yeah it does sound like it's an issue with the combination of Three and Community Fibre. Do you have any VPN apps or profiles that were set up on the phone only to trigger when at home? Or when away from home? If so, it might be worth removing these to see if that makes any difference. 

Pete.

[jr0]

Can't complain about WiFi calling on my Android and with Three. Switches fine (between cellular and WiFi) when needed and when I need certainty I force it to WiFi only.

I know there's an issue with sky broadband and WiFi calling https://www.ispreview.co.uk/index.php/2025/02/isp-sky-broadband-uk-promises-to-fix-router-wifi-calli...  so wondering if could be something similar but on a smaller scale 

Since you both have iPhones are you on the latest iOS version? As WiFi calling registration mainly depends on the handset and broadband (of course Three has to support such features but we know they have it)

[Paddiewack]

Good advice from jrO!

[Clever-Trevor]

Hi, Three Wi-Fi calling was once great - no so much these days.  I too suffer calls dropping & poor reception with WiFi calling. 
 Having both Three & EE - the iPhone with EE on WiFi calling works great. 

[Paddiewack]

Speaking for myself I’ve used WiFi calling for around three years and genuinely never had any problems except when my home broadband went belly up. Not pointing to a Three issue!

[Paddiewack]

I think you’ve got to take the advice from your isp with caution. That’s not to say there isn’t an issue but I’ve been with Three for a number of years and I absolutely depend on WiFi calling at home. I’ve used various iPhones over the years without any issues. My suggestion would be to connect your phone to a different WiFi network just briefly and remember these are most likely unsecured connections so don’t send any private details (Tesco/Sainsburys) are the ones I’m thinking of (you get the idea) and try maybe your wife calling you a number of times without you doing anything. If the issue persists then you could try resetting network settings on your phone and seeing if that makes a difference but if your phone works normally it points to a setting on your router as opposed to an issue with the mobile network,