POCO X2 features with a VoWiFi calling out from the box itself. The Poco X2 runs om MIUI 11 based on Android 10. It powered by Snapdragon 730G octa core processor combined with 8GB RAM & 256GB internal storage.
POCO X2 VoWiFi Calling

VoWiFi calling feature enable on Jio & Airtel network recently. Using this feature here after users can speak calls through a WiFi network instead of network calling. 

VoWiFi feature enabling in all devices one by one in the same vein, now the Poco X2 supported with VoWiFi calling feature. Therefore, using Poco X2 mobile you can speak calls via WiFi. However, it should be note that, your region and area need to be supported for using this VoWiFi callling feature.