VoIP calls are any calls that are made through the internet, instead of through traditional phone carriers. WiFi calls are a specific subset of these calls. WiFi calls are made through a local WiFi network (ex: the wireless network at your home, office, or a coffee shop). VoIP calls that are not also WiFi calls occur when you can use your carrier’s network (LTE, 4G, 5G, etc) to access the internet to make calls.