Your service provider frequently covers the expense of WiFi calling. However, it’s important to confirm with your specific provider. For international long-distance calls, certain carriers could charge extra, but you should hear a voice prompt informing you of this before placing the call.
You will typically need to download an app in order to use WiFi calling from your computer. One choice is to use well-known WiFi calling services like Skype or Google Hangouts, which are excellent for private talks with loved ones.
While the majority of people are perfectly content to use a mobile or desktop program to make WiFi calls, more established companies might also wish to spend money on VoIP phones and conference calling headphones.