We want to start a service like this [login to view URL] Please make sure you read through how it works. We also have our own asterisk deployment here but we would like to go the TEL API or Twilio as managing voip is not an easy task. Apps are also required android and iOS (Apple will not approve it) so need suggestion how we can have a browser based caller for this that works on iphone and website itself.
Please be careful to bid, Make sure you see how it works.