MetropleX Carrier settings are
vodafone_gb-40000000331.54. The fundamental problem is that VoWiFi has never worked by default with this carrier, whereas it does if using stock with the same settings string. The workaround I found with A12 was to access IMS Settings via
SIMn Provisioned, where
n is the SIM in question, and then change the value for parameter
1. This made the WiFi calling toggle appear and I could turn this feature on.
As of updating to A13, I can still make the IMS settings change, but it has no effect and if I reboot, I see that the value has reverted to
0. Hence it would seem that with this update you can no longer edit IMS settings from that menu. The best fix would obviously be for it to work by default, but failing this I was happy to go edit the parameter in IMS settings.
MetropleX Has anything changed in the Phone Info pane provisioning wise ##4636##?
Yes, neither VoLTE nor Wi-Fi calling are provisioned, as they were before the update.
MetropleX Have you checked the setting in the MyVodafone app is switched on?
MetropleX So many examples of this from Vodafone users or their MVNOs like ASDA or Lebara et al
My understanding is that MVNOs operate their own IMS and so I could see this complicating matters, but I'm a Vodafone customer and not MVNO. The other data points being:
- This worked fine — albeit with the manual config step for VoWiFi — prior to GOS update to A13.
- My partner has the exact same handset and is running stock, same build version and carrier settings, and WiFi calling worked out-of-the-box, without the manual step I needed.