Easy. With Pulse, you choose how you want to pay and how much data you need. $9.99 for 1GB $39.99 for 5GB $74.99 for 10GB $99.99 for 20GB $149.99 for 25GB (limited time 50GB)
If you need a little more data in a month, you can buy a GB for $15. You’ll get any unused overage data back as a credit on your next bill.
If this is your normal usage pattern, you’ll probably want to upgrade to the next tier. You can pay the difference immediately, and you’ll now be able to use the higher amount this month. Your billing cycle remains unchanged.