The upgrade order details will be displayed.
You can choose a payment method from any saved credit cards, or use a new card.
If you have a discount coupon, such as the free upgrade coupon issued when you registered for Smartbuild, then you can enter it here to benefit from the offer.
Click the "Continue to review" button to proceed the the next step.
The order review screen will be presented.
If you did not enter a discount coupon at the previous step, then you can enter one here.
Click the "Pay and complete purchase" to complete the process and charge the credit card.