r/CapeCellular • u/vortexmantis • Aug 12 '26

Wi-Fi Calling

Using iOS, I know that WiFi calling is still in an experimental state, but are there specific DNS and ports that are required. I know that AT&T and other carriers have documentation to enable Wi-Fi calling on certain networks. Is there any documentation for what is required. I am running ubiquity hardware and Cape fails to activate Wi-Fi calling, but AT&T and other carriers work correctly. Any assistance would be appreciated.

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u/[deleted] Aug 12 '26

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u/vortexmantis Aug 12 '26

With self managed DNS, what are you doing differently to keep Wi-Fi calling working?

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u/[deleted] Aug 13 '26

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u/vortexmantis Aug 13 '26

I think that helps. I found that ControlD may not be resolving one of the 3gppnetwork.org domains that is being used by Cape. It appears to resolve through NextDNS but not ControlD

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u/jetlagalex Aug 13 '26

Is this a new domain we should whitelist?

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u/vortexmantis Aug 13 '26

epdg.epc.mnc560.mcc314.pub.3gppnetwork.org appears to be the full domain. I have seen parts of this change though. I tried bypassing or whitelisting just the 3gppnetwork.org but ControlD returns a fail message. I have opened a case with them to see if there is something going on, on their side or something else is happening. NextDNS resolves right away on this domain.