How do I apply a promotional code when buying SMS credits?

Occasionally we run offers for topping up your SMS credits. To apply this promotional code to a purchase :-

On a large tablet or desktop device:

• Select the credit pack you’d like to purchase
• On the payment page, click the “Add promotion code” link in the left sidebar
• Enter your promotional code and click “Apply”
• Enjoy your discount!

On a small tablet or mobile device where the sidebar is not visible:

• Select the credit pack you’d like to purchase
• On the payment page, click the “Add code” link in the top-right corner of the page
• Click the “Add promotion code” link
• Enter your promotional code and click “Apply”
• Enjoy your discount!