[Feature Request] Allow routing VoWiFi over wired ethernet transport

Basic info

  • Device: all with VoWiFi
  • CalyxOS version: newest (please check)

Brief description of the feature

Currently, when a phone is only connected to the internet using a USB-C wired Ethernet adapter or docking station, phone calls using the high-quality wired internet connection are not possible because the general AOSP code for VoWiFi and VoLTE only takes WiFi and cellular connections into account, disregarding wired connections. This, however does not make sense because any working internet connection except cellular is not even distinguishable by any cellular carrier or modem based on the transport used. Therefore, it could also be considered a bug in AOSP.

I propose adding an "Ethernet Calling" switch alongside the "WiFi Calling" switch that activates routing phone calls over the internet using a wired connection. Someone might have a reason to keep it disabled separately and can still do so this way.

Other ROMs with the same / similar feature (preferably open source)

None (to my knowledge)

Any other info

The bug or missing feature can be tested by switching on VoWiFi, then connecting the Phone to the internet using a network cable with a USB-C Ethernet adapter or docking station. When attempting to call a phone number, it does not work without any logical reason because the wired internet connection works just fine with everything else.

This has also been reported on the LineageOS issue tracker LineageOS/issues/android#6448 (closed) (but they do not accept feature requests) and I reached out to GrapheneOS https://github.com/GrapheneOS/os-issue-tracker/issues/6016 as well. The Android issue tracker might also be worth reporting to, but someone with a Google account would have to do that, because I neither have nor want one. Currently, it was only reported for ChromiumOS there: https://issuetracker.google.com/issues/397721352

Screenshots (currently not from CalyxOS) showing general current AOSP behaviour:

Airplane mode Wired internet connection Call does not work
Screenshot_20250811-135245_Settings Screenshot_20250811-135235_Settings Screenshot_20250811-135226_Phone
Edited by Emanuel Loos