Hi to Nokia community.
3 days ago i officially upgraded my Nokia 8 device (TA1012, EU) to Android 9 Pie.
After upgrade i noticed that VoLTE/VoWiFi has some issues/bugs.
First of all, even if it was active on my phone since the previous OS, android 8.1 Oreo, and was properly working on my 4G+ network (Cosmote Greece), when installing Pie it didnt function initially and had to deactivate/activate function on device menu and then restart device to operate. Since then, VoLTE/VoWiFi is deactivating randomly sometimes when i explore device menus even if i dont deactivate this function. Each time VoLTE/VoWiFi is deactivating, i have to restart/reboot device to activate it.
Second issue i found on Pie, is that when device is on airplane mode, when i activate Wifi, although VoLTE/VoWiFi was previously active, i cannot make calls with VoWifi, although that capability was enabled with previous version of Android 8.1 on my device and was operating perfectly.
Many other Nokia 8 users in my country (Greece) who got Pie, are also facing these issues.
So, please Nokia Support bear in mind those VoLTE/VoWiFi issues and fix them on the next Nokia 8 software update.