After updating to the new update (8_WW_30.11.51.103) , the VoLTE and VoWiFi are not working at Deutsche Telekom (Hungary). It was good since the 30.11.51.83 update, but the last update changed something. It appears and can be turned on/off in the menu, but nothing changes. Call voice quality is as bad as in June. I tried factory reset, but it didn't solve the problem.