> VoLTE has really put an end to that for me, as I'm on LineageOS. This is extremely device dependent. Out of officially supported LineageOS models, the genera

> VoLTE has really put an end to that for me, as I'm on LineageOS. This is extremely device dependent. Out of officially supported LineageOS models, the general rule of thumb has been VoLTE that works in stock firmware on Motorola or Oneplus will also work in LOS. Samsung won't as they have a proprietary implementation. AT&T goes a step further than just blocking devices that don't register on IMS and also runs IMEI whitelists so almost all imported phones will not work on their network.