Access the Billing tab by clicking on the three dots next to your name. In this tab, you'll find several items:
You'll see the different plans we offer, and the recommended plan based on your usage will be highlighted in green. Simply select the plan you want and enter your credit card information.
You'll see your SMS balance, and if you're in the red or are at risk of running out of SMS for the month, you'll have the option to purchase a pack of 1,000, 2,000, or 4,000 SMS messages for a fee. Simply click "Buy SMS," choose the pack you want, and then enter your credit card information to pay and add the SMS messages.