Hi Alan,

Thanks a lot for the info.

It seems the entitlement server is used for the operators to control the access to WiFi calling if their subscriber is allow to use it. My question is on the step before using the entitlement server.

BR,

Koji

2024年10月25日(金) 21:54 KageDS <alan@kageds.com>:

As i recall, iOS uses an Entitlement Server to determine if WiFi calling
is available on the network.

Alan

On 25/10/2024 10:55, Koji Tsubouchi wrote:
> Hello experts,
>
> I am trying to use WiFi calling in iPhone by using sysmoISIM-SJA2, but
> for some reason "WiFi Calling" toggle button is not shown in the phone
> setting.
>
> I am using PLMN ID 441-216 (Newly obtained from Japanese Government
> for private network usage).
> I have written epdgid, epdgSelection, and pcscf address in the SIM
> card and saw if the toggle button was shown, but it was not.
> It would be really appreciated if you could tell me how to enable WiFi
> calling in iPhone.
>
> Thanks&Regards,
> Koji
>