Active VoLTE on Fairphone 6 results in Unknown caller ID
- /e/OS version: 3.4-a15-20260114569178-official-FP6
- Device model(s): Fairphone 6 with preinstalled /e/os
- Impacted Application: /e/OS Dialer
- Affected application/URL: /e/OS Dialer
- Browser/client and version: Version 23.0 (com.android.dialer)
The problem
Describe precisely the problem you're facing and add screenshots to illustrate
I have Happybytes and are using my FP in Norway. Happybytes are utilizing Telenor as a network provider. Norway is closing down their 2G network (3G already closed) by the end of 2027 (and Europe by 2030 I believe). Many providers have already done so. Which means that 4G calling or VoLTE is required. Whenever I activate VoLTE I am able to receive and transmit calls, however, whenever I receive a call, the caller ID is just saying Unknown even if the caller is in my contacts. If i try the same, but with VoLTE deactivated, the number/name displays according to my contacts.
Based on the provided screenshots (note: the call was done without WiFi on), I can see that IMS registers and VoLTE is Available. I can also see that the received call is performed over VoLTE when accepted, based on the HD icon, 5G coverage icon and the fact that I am able to browse using mobile data while on a call.
Additional information might be found in the community forum.
Steps to reproduce
- Have a Fairphone 6
- Use Happybytes sim
- Turn on 4G Calling in sim settings
- Receive a Phone call
Technical details
Paste any relevant logs (adb logcat) in the codeblock below if you have any