title: What API to use to check if user is about to use roaming call?
body: <p>I'm developing an app that handles phone numbers and bumped into a problem that I have to pop up a warning message if a user is trying to make a roaming call (to make it clearer, I'm implying the user is in another province/state). I found this article(<a href="https://stackoverflow.com/questions/900547/is-there-any-way-to-determine-if-the-iphone-is-roaming">Is there any way to determine if the iphone is roaming?</a>) from stackoverflow but it's quite old.</p>
  
  <p>Has Apple provided any api for this? If Apple has, what's the name of the api/class to use? If hasn't, is that article still the only solution for this problem?</p>
  
  <p>Thank you!</p>