Just wondering whether there are easy ways to retrieve country calling code from a user's phone.

For example, my app would like to pre-fill country calling code for the users. If the user is located in the U.S. the code +1 will be returned, +83 for China, +61 for Australia etc.

I had a look around but I could only see:

NSLocale *locale = [NSLocale currentLocale]; NSString *countryCode = [locale objectForKey: NSLocaleCountryCnode];

Which returns the abbreviation for the country code, not the calling prefix?

Help is appreciated!