In plain English
It means unused mobile data does not simply disappear at the end of one billing cycle. Instead, the unused part of the data allowance is kept and made available in a later billing period.
In context
In the monthly feature list, "rollover data" names a plan feature where unused data allowance from one billing period is carried forward for use in a later billing period.
- Situation
- Choosing mobile plans, allowances, roaming, fair-use, and add-ons
- What it communicates
- names a plan feature in the monthly feature list.
Meaning limits
The term alone does not state how much unused allowance can be carried forward or how long it remains available, because those details can vary.
Examples
“After using only 6 GB of her April allowance, she began May with 4 GB of rollover data.”
“The monthly feature list marks rollover data as included with this plan.”