Yes, you can carry over unused data from an active plan to a standby plan, but there are certain conditions. The plans must be the same product type, meaning they should have the same specifications such as the number of IPs and plan size. Additionally, it's important to purchase the standby plan before the active plan expires. If the standby plan is not purchased in a timely manner, the unused data will not be carried over, and it will be lost.
Let's consider an example to better understand how the rollover feature works. Suppose you have an active plan of 200 IPs/US/Rotating-Residential with a remaining data balance of 10GB. Before the active plan expires, you decide to purchase a new plan of the same type, 25 GB, 350 IPs/US/Rotating-Residential.
In this case, the 350 IPs plan will remain on standby until the 200 IPs plan expires. Once the active plan expires, the remaining data balance of 10GB from the active plan will be carried over to the new plan. You will start using the data from the new plan while benefiting from the carried-over 10GB of unused data = 35 GB.
This example illustrates how the rollover feature allows you to carry over unused data from one plan to another when specific conditions, such as the same product type and timely purchase, are met.