Non-expiry data, rollover and daily allocations compared
Long validity, automatic rollover and an extension triggered by another purchase are different promises. Compare the product’s deadline and conditions before dividing its price by the advertised GB.
Reviewed by Riccardo Vallaro, Telecom & Mobile Services Specialist
Last reviewed: 12 October 2026
Sources we check: Current public product pages and terms read 12 October 2026. Conflicting Cell C transfer wording is retained as uncertainty; no unsupported long-validity prices are imported.
Why trust this: Guides are based on public operator pricing, USSD flows, official support pages, and South African prepaid user needs.
Found outdated info? Send a correction.
Product examples checked on 12 October 2026
Capitec: no-expiry and expiring bundles coexist
The public catalogue lists no-expiry data separately from 1-, 7-, 30- and 60-day bundles. “Capitec data never expires” is too broad: the R150/10GB base bundle sits in the 30-day family. Linked-number extras are conditional and should not replace the base allowance in a comparison.
AirMobile: a calendar deadline, not a fixed 60 days
AirMobile Monthly allocations run from the first day of the month through the end of the following month; rollover does not exceed 31 days. Paid data top-ups expire at the end of the month after allocation. A mid-month top-up therefore has a different duration from one bought on the first day.
Vodacom Prepaid LTE: buy again before expiry
This product’s terms allow extension by buying another bundle of the same size and validity before the first expires. That requires spending again. Do not assume the standalone Night Owl family has the same rule: its terms prohibit carry-over, transfer and roaming.
MTN Super Data: do not assume carry-over
Super Data’s terms prohibit data sharing and carry-over. Leaving the price plan also forfeits unused, unexpired Super Data and voice bundles. Confirm the exact tariff before changing plans to save money.
Cell C: check the family and the conflicting wording
The 30-day bundle PDF describes extension when another bundle is purchased before expiry. It permits inclusive-data transfer in main clause 16 but prohibits user-to-user transfer in General clause 6; get product-specific confirmation before relying on a transfer. Daily/Daily Nite and Day-by-Day allocations instead forfeit unused daily data. These are separate products.
What a comparison should measure
Record the base anytime amount, expiry timestamp, repurchase requirement, inactivity rule and any charge needed to keep the service active. Work out how much you will actually use before expiry. This is a set of verified examples, not a complete all-network tariff or transfer-fee matrix.
Useful next steps
Use the relevant checklist or calculator below to continue with your decision.
How this guide was reviewed
We checked the claims that can change against the primary sources below. Phone menus and operator settings can vary by device, price plan and customer profile, so confirm the final option shown on your own line.
Frequently Asked Questions
Is non-expiry always cheaper?
No. It can avoid wasting an unused balance, but a shorter bundle can cost less for the amount you actually use. Compare total spend and usable data over the same period.
Does transferring data restart its validity?
Do not assume it does. Check the exact transfer product, eligibility, fee and the recipient’s expiry before confirming.
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Author and review notes
Written by Riccardo Vallaro
Telecom & Mobile Services Specialist
Mobile services and telecom professional with experience across VAS, carrier billing, mobile content, and African operator partnerships.
Reviewed / updated: 12 October 2026
Why trust this guide: Guides are based on public operator pricing, USSD flows, official support pages, and South African prepaid user needs.
Found something outdated? Send a correction.
Independent analysis: We compare publicly listed prepaid prices and bundle terms. Prices may change, so always verify with the operator. Read our methodology and editorial policy.
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