Does the POCO X7 support VoLTE HD voice calls?

The POCO X7 supports VoLTE HD voice calls. VoLTE HD voice refers to high-definition voice calls made over the 4G LTE network, which provides crisper, clearer sound compared to standard voice calls over 2G or 3G networks.
The requirements for VoLTE HD voice calls:
1. Device support: The smartphone needs to be VoLTE-compatible. Not all devices support this feature;
2. Network support: The mobile carrier needs to support VoLTE. This service is increasingly available worldwide but could not be enabled in some regions or for certain operators;
3. LTE network coverage: VoLTE requires LTE (4G) coverage. If you're in an area without LTE coverage, VoLTE calls will fall back to 3G or 2G networks, which won't provide HD voice quality.