22-10-2014 04:10 PM
22-10-2014 05:36 PM - edited 22-10-2014 05:37 PM
There are no add-ons for international calls.
You need cash credit on your account to pay for international calls.
See here:
At 75c per min for calls to the US in my opinion you might be better off looking at alternatives such as Skype etc.
Hope this helps.