title: how to call from one twilio account phone number to another twilio account phone number?
body: <p>Currently I am having 2 free trail twilio account. 
  So I have 2 phone numbers, I per each account.
  these 2 phone numbers are verified by each other.</p>
  
  <p>So How to make a call from 1 twilio account phone number to another twilio phone number? </p>