title: How to implement IVR call feature in iOS app?
body: <p>I am a new developer working in swift 3 iOS. Pardon me in advance for any confusions and blunders as I am really new to this. So, I want to create an iPhone app for customer service.</p>
  
  <p>For example, Like MyAirtel app where the users login and access their account information. I want to implement a Voice over IP call feature in this. The call is a Ip call without using any phone numbe - like a skype call - to the IVR system where a programmable voice ask us to press 1 for this and 2 for that. It connects to the database and retrieves information or routes the call to an agent whatever is required. </p>
  
  <p>How can I do this? What are all the requirements? How does it work in developer terms? </p>
  
  <p>Can someone please explain this? Simple explanation with references and softwares will be appreciated.</p>