Hi,
> The address(es) of the ePDG are discovered using DNS: the phone will try
> to resolve epdg.epc.mncXXX.mccYYY.pub.3gppnetwork.org, where XXX is your
> operator's Mobile Network Code (for instance Swisscom is 001), and YYY
> is your Mobile Country Code (228 for Switzerland).
>
> So I guess a
Hello,
From my experience, in most (all?) cases, the "untrusted non-3GPP
access" model is used. In this scenario, the mobile phone establishes an
ipsec tunnel with a network element called "ePDG" (Evolved Packet Data
Gateway) to connect to the mobile core. See 3GPP TS 24.302 for details.
Hi
I have not been digging into this too much, but I have a few clues
which could be helpful.
* Swisscom branded mobile phones (Samsung at least) prevent WiFi (or
VoLTE) calling (HD Audio) from being used when SIM cards of other
operators are used. (Maybe Swisscom uses a specific flavour of
Dear Community.
We have a problem (tm): At some sites, WiFi Calling works, at others it
does not. Sometimes it's dependent on the provider, e.g. Sunrise
works, Swisscom does not. At another place, Salt works, but not
Sunrise.
Does anyone know when a mobile devices decides that WiFi calling
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