How to use wifi to make domestic calls abroad?

Generally speaking, using wifi to make a phone call is an internet phone, which can be video and voice. Of course, QQ and WeChat are widely used now, and skype and other software have been used before. Generally, if you have an internet, a mobile phone or a computer, you can use social software such as QQ WeChat to "call" your family and friends. As long as the other party has the same software and network, they can use the functions in the software for voice chat and video call. Of course, if you only know the phone number, you can use other VoIP software, many of which can be used for free, but the caller ID of the other party is not your phone number. Nowadays, smartphones are very popular. QQ WeChat can generally be installed. When both parties have networks, they can use this common software to make phone calls. I hope my answer can help you, and I hope it will be adopted.