I recently switched to iD and everything is working perfectly. My husband is now envious of my WiFi calling capabilities and also wants to switch. However, when we put my iD SIM in to his phone it didn't automatically reset and update to the new carrier settings in the same way mine had. We did this test in a location where the signal is good to check his phone wasn't locked. The phone picked up the network and 4G signal worked fine but the option to turn on WiFi calling did not appear in his settings. We both have an Xperia XA2, so I expected the same functionality as I get from my handset. Does anyone know how to get the handset to update to the new carrier settings when switching the SIM?