Wifi Calling not working all of a sudden

[eemmbar]

My wifi calling is no longer working which is not ideal as there is zero data in my area.  I have done everything i can from SW upgrade on the Iphone to rebooting Router to trying everything on the device I can find on google and still nothing.  I cannot receive or make calls and I even tried my neighbours router and still have the same issue.  I cannot get wifi calling to come back.  Any suggestions please as other than on whatsapp I am unable to make or receive calls.

[bristolian]

Voice calls don't use data, they use the exact same network signal as data.

What have you found on Google, that you've tried thus far? If the one phone is not working on multiple routers, it tends to suggest a device problem.

Can the phone use other internet-based services on the same router?

[EmmaAB]

Yes the phone is working fine for everything other than WiFi calling and making calls (but that’s signal dependent as zilch here). 
I’ve done the usual aeroplane mode off on switched off phone several times disabled and enabled WiFi calling several times.  
Not router blocking as others in house are using WiFi.

iPhone 12 updates for all SW updates (am forced by work to take them anyway).

[bristolian]

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@EmmaAB wrote:

Not router blocking as others in house are using WiFi.

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Are others in the house using WiFi-calling? And if so, what phones are they using?

[EmmaAB]

Yes they are one is on an iPhone other is a Pixel 6. 

[Peter_W]

Thanks for reaching out to us about this, @EmmaAB .

Is it just your phone that's having this issue, or is the Pixel 6 noticing the same issue?

If you haven't already, it's worth trying a network settings reset on your phone too. 

To do this go to Settings > General > Transfer or Reset iPhone > Reset > Reset Network Settings > Enter PIN (if required). At this point, your phone will power off automatically, then switch itself back on. 

Don't worry, you won't lose any personal data such as contacts or photos with this reset, but you will need to provide your password next time you connect to WiFi.

Peter