Pro rates & your first bill explained Brody D. September 08, 2022 16:05 Updated For a more detailed written explanation of pro rate see here. Related articles How does Gabb charge me? When does my billing cycle begin? Prorates - understanding pro rate in & pro rate out Cancellation or suspension of lines & service Why did I receive an invoice after canceling my service plan or line? Multiple line discount - Family Plan Comments 0 comments Article is closed for comments.