In plain English
It is a temporary extra for a mobile plan, such as more allowance or an added feature. It is bought for one occasion only, and it is not set to renew by itself.
In context
Here, the term classifies the extra as a temporary purchase for a single occasion rather than a repeating add-on.
- Situation
- Choosing mobile plans, allowances, roaming, fair-use, and add-ons
- What it communicates
- classifies an extra as temporary rather than repeating.
Meaning limits
The term alone does not specify what the extra includes or how long it lasts; it only identifies it as non-renewing.
Examples
“She bought a one-off add-on for extra data for the trip, not a recurring add-on.”
“Choose a one-off add-on if you only need extra minutes for the holiday weekend.”