The mobile fulfils Swisscom's VoLTE requirements, as Honor smartphones with MagicUI 4.0 and higher have VoLTE activated by default and no longer display a separate VoLTE setting. VoLTE is therefore automatically active, which corresponds to the Swisscom requirements. For a detailed check, you can check in the settings under mobile networks whether VoLTE calls are activated or contact Swisscom directly.