To avoid suprise, everyone must ask read and learn their bill to avoid confusion. Your billing cycle is important to know. Always remember we are billed one month in advance. Everytime you made changes in between the billing cycle period, those changes will reflect on the following bill. The summary of prorated charges or credit will also be shown on that bill including the date where changes made.Changing your plan or features may result in prorated charges or credits if the change is effective in the middle of your bill cycle. To avoid prorated charges, schedule plan or feature changes to start on the first day of your next billing cycle