Twilio Easy Call is a WordPress plugin enables your company to convert web traffic into direct communication over the phone, with just the click of a button.
This plugin integrated with TWILIO (Cloud communications platform for building Voice & Messaging applications) http://www.twilio.com
To use this plugin you should have paid account on Twilio to be able to enjoy with the voice service
Please see Twilio Pricing here https://www.twilio.com/voice/pricing
A simple form on your web page allows visitors to enter their phone number, and with the click of the “call” button their information is routed to agents who can then contact them to provide help, support, and other services.