As with the current phone-based service, you use VoIP the same way you use a regular landline: by picking up the phone to answer it, or dialing a number to place a call.

On a mobile device, you can use a VoIP-enabled app to connect.

Select providers have their own mobile apps for ease of convenience. And with a computer-based service, you can use a softphone to make or answer the calls with a headset, complete with a microphone.

If you make a call via a mobile phone, tablet or computer, they are like making a call through WhatsApp.