Yes, of course. As long as you have enough credit in your pay-as-you-go account then you can contact anyone in the world.
The price differs significantly between locations and whether you are calling a landline or a mobile. You can check out the International Call Charges and enter the exact number you wish to call to work out the price per minute.
If you need any further help today, please don't hesitate to contact our friendly support team on 020 7864 4690 or by email!