Before you can launch a campaign or send a test message, you must finish setting up your TNS account by entering your credit card details. The fees for using TNS will be charged directly to your credit card each month.To enter your credit card details, click the Settings menu on the left then click the Subscription option.On the screen that appears, you enter your credit card details and click the Subscribe button. To change your credit card details in the future, click the Subscription option again then click the Update card button on the Subscription settings screen.To cancel your subscription to TNS, click the Cancel subscription button.