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Hi my iPhone 12 mini requires me to reset my network setting very frequently to re-establish WiFi calling capability.
the phone remains connected to WiFi and I can even perform FaceTime calls.
if I place my sim into my iphone 10Xr I don’t have this problem.
iPhone 12 mini
If the SIM has a reasonable signal then it will use the SIM in preference and wi-fi calling turns off.
There is no advantage in wi-fi calling as you still use your carrier call data either way. It can also be worse quality than SIM.
What doesn’t make sense is that if the SIM card is placed into an older model iPhone XR, the WiFi calling works as it is supposed to.
Hard to blame the carrier when the phone is the only variable that is changing.
I have…
in addition to basic trouble shooting,
reprovisioning, new SIM card, trying the eSIM. I’m not sure what else to try.
if you have any idea what to ask the carrier to do or try I’m certainly all ears.
Also why would it work for one phone and not the next?
WiFi calling works with a cellular carrier by allowing traffic from your device to use the Internet rather than the cellular network to inject data into their system.
The SIM card only controls the cellular portion of the phone.
If their database isn't properly configured to allow packets originating from your device into their network, WiFi calling won't work.
Your device will be allowed onto their cellular network because of the SIM card,, but packets won't be allowed into their network from your machine via the Internet - the carrier's network is firewalled so it only accepts data from devices explicitly allowed to send that data to their network, and that is what seems to be failing.
Dogcow’s post raises a possibility - at least in my mind - in this intriguing discussion.
Perhaps your carrier “sees” your original XR as “legit” …
… while it “sees” the new 12 as an “imposter” containing a possibly a misappropriated SIM.
As to the 20m delay … beats me. 🤔
Question: Is your SIM from a MNO or a MVNO? (just curious)
Something in your cellular carrier's network.
Ultimately, that's who is responsible for the feature.
this happens when I have no cellular signal.
also in airplane mode.
You will get no wifi in Airplane Mode.
Unless you reenable it; using WiFi in Airplane mode is how you access in-flight entertainment on most airlines now.
OK you can turn wifi back on for media and web but I assumed wifi calling is turned off in airplane mode. Maybe I'm wrong.
FWIW, WiFi calling w/ T-Mobile def works while in “cellular” airplane mode.
The real question is, what happens to the network settings 20 min after resetting them that I regain full function of WiFi calling.
what network setting is changing?
Despite your assertion, it's a carrier issue.
Apple has absolutely zero to do with Wi-Fi calling.
Have you contacted your carrier? Usually it's due to misconfiguration on their end of some type.
Thanks, I’ll hammer the carrier or try a new one and let you know the outcome. Helping target the right party gives me at least some direction finding a resolution.
WiFi calling stops working
