To call your friends worldwide it's easy, you just need to use the international format:
+ (country code) (area code - number)
Here are some examples :
To call your friend in France, dial : +33 ( erase 0 from area code - number)
To call your friend in Mexico, dial : +52 (area code - number)
or +52 1 (area code - number) if you want to reach a cell phone with a 2 digits area code,
To call your friend in the Philippines, dial : +63 (area code - number)
To call your friend in Pakistan, dial : +92 (area code- number)
To call your friend in Chili, dial : +56 (area code- number)
To call your friend in the UK, dial : +44 (area code- number)
...
Don't forget the "+" , Do not dial 00
(tap a long 0 to dial +)
If you are unsure of the country code for the country you are trying to call, you can tap the flag on the dial pad and search for the country. Select the flag and dial the number, that's it!