title: Getting country calling prefix
body: <p>Just wondering whether there are easy ways to retrieve <strong>country calling code</strong> from a user's phone.</p>
  
  <p>For example, my app would like to pre-fill country calling code for the users. </p>
  
  <p>If the user is located in the <strong>U.S. the code +1 will be returned, +83 for China, +61 for Australia etc</strong>.</p>
  
  <p>I had a look around but I could only see:</p>
  
  <pre><code>NSLocale *locale = [NSLocale currentLocale];
  NSString *countryCode = [locale objectForKey: NSLocaleCountryCode];
  </code></pre>
  
  <p>Which returns the abbreviation for the country code, not the calling prefix?</p>
  
  <p>Help is appreciated!</p>