Upgrading to Silver is easy and completely secure. Your profile information should be filled in for you automatically below. You should not have to change anything there. In the Billing Method section below, click on Add Billing Method to add a credit or debit card. All debit cards should work, even prepaid debit cards, as long as it has the Visa or MasterCard logo. Once that is done, click on the submit button in the Checkout section. When your payment is complete, your account will be upgraded automatically.