title: Call a Phone number and pass DTMF using iOS
body: <p>How to achieve the below requirement using iOS?</p>
  
  <p>1) Programmatically dial a Phone Number through iOS.</p>
  
  <p>2) Send additional DTMF after the number is called.</p>
  
  <p>I found <code>tel</code> URL scheme is available to make a call. Not sure about sending DTMF tones.</p>
  
  <p><a href="https://developer.apple.com/library/archive/featuredarticles/iPhoneURLScheme_Reference/PhoneLinks/PhoneLinks.html" rel="nofollow noreferrer">https://developer.apple.com/library/archive/featuredarticles/iPhoneURLScheme_Reference/PhoneLinks/PhoneLinks.html</a></p>