Do HD VoLTE calls use plan data? I’m just wondering if I should have this feature enabled or not.
VoLTE calls do not use plan cell data. Like “regular” calls they do use Republic supplied cell data for setup. You will want to enable the feature as in some locations Republic’s GSM partner has extended range LTE (a/k/a Band 12) coverage only. Calls made when connected to a Band 12 tower are VoLTE.