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Galaxy S9 - starlte SM-G960F - No Voice over 4G?

  • /e/OS version: 3.2
  • Device model(s): SM-G960F
  • Android version 12

From this morning 3G Free Telecom Network in France is not accessible, and with it, no phone calls are possible on Galaxy S9 with /e/OS!

On a Fairphone 5, with same /e/OS version (3.2) when Preferred network is limited to 3G, no phone calls are possible either. But when selected to 4G and Voice over 4G selected as well, phone calls are possible.

But on the Galaxy S9, no Voice over 4G seems available. Neither Preferred 4G network is possible to select. Maximum available is LTE, although on https://doc.e.foundation/devices/starlte, in available Network is written :

  • 4G bands: B1-B8, B12-B13, B17-B20, B25-B26, B28, B38(TDD), B39-41(TDD)

Any way to overcome this problem?