VoLTE is not working anymore Since updating from 1.19.1 to 1.20
- /e/ version: 1.20-s-20240220382012-stable-GS290
- Device model(s): Gigaset GS290
- Developer mode enabled: no
- Device rooted: no
- Trackers blocker enabled: yes
Since updating from 1.19.1 to 1.20 VoLTE is not working anymore, calls are working trough GSM (2G) only. Also, can’t find the settings for enabling VoLTE or WiFiCall anymore: Network & Internet → Calls & SMS → Calls and SMS both greyed out and not working; Network & Internet → Sim-Cards → Provider → VoLTE, WiFiCall and Video call options are not listed at all.
Steps to reproduce
The described behavior is permanent, also after reboot.
What is the current behavior?
Checked the APN settings several times and they seem to be correct (for Telekom). LTE internet connection works perfectly with the untouched defaults. I also added and checked alternative APN settings as officially proposed by the carrier Telekom and Congstar. Again, LTE internet connection works well with these APN new alternative settings. But in NO case the settings for VoLTE or WifiCall or VideoCall under Networks & Internet - SIM-cards get available, they are just not there (MMS setting is there, though). And in no case VoLTE is working, again.
What is the expected correct behavior?
VoLTE working plus availability of the unavailable settings.
**Technical description IMS-Status says “IMS-registration: not registered, Voice-over-LTE: not available, Voice-over-WLAN: not available, video-calls: not available, UT-surface: not available”
Workaround
No workaround found, yet.
Possible fixes
This seems to be a deeper configuration problem as IMS gets not registered. Up to build 1.19.1 VoLTE worked fine without any additional settings to change. Maybe it is a regression of this build 1.20 connected to this older issue: #2494 (closed).