WI-FI Calling Not Working on Teracube 2e (2021) and /e/OS 4.2 emerald and 4.3 emerald

Using /e/OS Troubleshooting
,
1

Problem:

WI-FI Calling Does Not Detect WIFI When Cell Reception Lost
Teracube 2e (2021)

/e/OS 4.2 and new 4.3 emerald
Wi-FI Network available, strong signal, and otherwise connected to the Teraacube
Occurs on T-Mobile (US) or Verizon (US) networks

I have tried all suggested options to correct (APN resets, reboots, various WI-FI Calling options, Aiplane Mode trick, etc.) and installed (2026-09-29) /e/OS 4.3 emerald.

Problem: The Teracube will not use Wi-Fi Calling anymore

  1. Assume zero bars/no cell phone signal reception.
  2. Teracube 2e setup to use Wi-FI Calling.
  3. Teracube connected to WIFI (confirmed WIFI use for web, email, etc.) However, the Teracube will not use the Wi-FI connection for Wi-FI Calling. When trying to make a call, the Teraacube reports “Connect to a WIFI network or mobile network to make calls.” No trouble-shooting method helps (neighter does the newly released 4.3).

An old iPhone at the same location works seemlessly with WIFI Calling.

The Teracube previously allowed WI-FI Calling.

Research shows this may be an issue with upstream LineageOS 22.2 and 23+.

Suggestions??
Does anyone have any options? Or can anyone confirm an older /e/OS version that does work with WI-FI Calling and how to downgrade? This is a serious problem for us as there is no cell service at our house.

2

This may or may not help. But I noticed some versions back the place to set the WiFi calling was moved in the Android and thus eOS.

Try Settings>Network and Internet then select the cell provider setting cog, the gear at the right of the provider name. Scroll down to Wi-Fi- Calling and look at the setting in there.

Maybe it has been turned off?

1 Like
3

First, THANK YOU for the suggestion.

I verified that WI-FI Calling is ON using your instructions: WI-FI Calling (WIFI Calling) is on–Navigate to Network…SIMs…{sim provider name} …Calling… Wi-Fi Calling… Use Wi-Fi calling (ON). I also rebooted twice after turning off and then back on. I have tried all three Wi-Fi Calling options under {WI-FI Calling Preferences} Call over Wi-FI, Call over mobile network, and WI-Fi Only. None work.

I am connected to a local WIFi network–I thought maybe the WI-FI signal was too strong or something and tried in several areas but that does not seem to effect the WI-FI Calling.

Thanks for responding. Good point to check the status.