This would make Koodo stand-out from the other carriers in the market. Offer to Roll-Over the previous month's unused data allowance. This will benefit customers that do not use up their monthly usage due to traveling, work, etc. The beginning of each billing month, the customer will receive a text message or email on the bonus Roll-Over data amount.
The Roll-Over amount would be month to month and restarts each bill cycle. Therefore, the Roll-Over bonus would not be accumulated over the months. Even offering 50% of the unused data usage for the Roll-Over would be a great idea.