The cheapest network depends on bundle size, validity period, public pricing, and how you actually use data. Use this guide to compare MTN, Vodacom, Telkom and Cell C by cost per GB, upfront price, and expiry rules before you buy.
This table shows 8 source-checked once-off smartphone bundles from our recorded prices, sorted by cost per GB. It mixes validity periods, so it is not a like-for-like monthly ranking or a complete market comparison. Router, social and night-only products are excluded. A night bonus does not remove a separately stated anytime allowance; cost per GB here uses only anytime data. For a broader starting point, use the compare data deals in South Africa homepage.
Need data for a full month? Compare the dedicated 10GB, 20GB and 30GB monthly offers. Those comparisons separate pooled anytime data from night and daily-release allocations and show provider eligibility.
| Rank | Network | Bundle | Price | Validity | Cost per GB |
|---|---|---|---|---|---|
| 1 | Vodacom | Vodacom Hourly 250MBAnytime: 250MB; Night: 0GBSource checkedVodacom prepaid data page | checked 2026-10-02Vodacom source and terms | R5 | 1 Hour | ~R20.00/GB |
| 2 | MTN | MTN Daily 1.5GBAnytime: 1.5GB; Night: 0GBSource checkedMTN Internet Bundles terms | checked 2026-10-02MTN source and terms | R33 | 1 Day | ~R22.00/GB |
| 3 | Cell C | Cell C Daily 1GBAnytime: 1GB; Night: 0GBSource checkedCell C data bundle catalogue | checked 2026-10-02Cell C source and terms | R25 | Until midnight | ~R25.00/GB |
| 4 | Telkom | Telkom Daily 1GBAnytime: 1GB; Night: 0GBSource checkedTelkom time-based bundles | checked 2026-10-12Telkom source and terms | R31 | 24 Hours | ~R31.00/GB |
| 5 | Vodacom | Vodacom Weekly 1.5GBAnytime: 1.5GB; Night: 0GBSource checkedVodacom open-market bundle price changes | checked 2026-10-02Vodacom source and terms | R75 | 7 Days | ~R50.00/GB |
| 6 | MTN | MTN Hourly 150MBAnytime: 150MB; Night: 0GBSource checkedMTN Internet Bundles terms | checked 2026-10-02MTN source and terms | R8 | 1 Hour | ~R53.33/GB |
| 7 | Vodacom | Vodacom Once-Off 3GBAnytime: 3GB; Night: 0GBSource checkedVodacom open-market bundle price changes | checked 2026-10-02Vodacom source and terms | R165 | 30 Days | ~R55.00/GB |
| 8 | MTN | MTN Weekly 1.2GBAnytime: 1.2GB; Night: 0GBSource checkedMTN Internet Bundles terms | checked 2026-10-02MTN source and terms | R69 | 7 Days | ~R57.50/GB |
There is no single cheapest network for every South African user. The best answer changes by bundle size, validity, public price, and whether you need a once-off top-up or better monthly value. Start with cost per GB, then check the validity period and whether the bundle fits your real usage pattern.
Compare both price and expiry: a 1GB bundle that expires tonight is not a month-long allowance.
Price: R25 | Validity: Until midnight | Approx. value: R25.00/GB
Useful when 1GB is too small but you still need to keep spend tight.
6 source-checked 2GB-class offers in the full comparison.
Lowest pooled-anytime price in that class: Capitec Connect, R59. Product eligibility and payment terms apply.
A common mid-range benchmark for moderate prepaid usage.
6 source-checked 5GB-class offers in the full comparison.
Lowest pooled-anytime price in that class: Vodacom, R99. Product eligibility and payment terms apply.
A strong indicator of mainstream monthly value for regular users.
10 source-checked 10GB-class offers in the full comparison.
Lowest pooled-anytime price in that class: Vodacom, R149. Product eligibility and payment terms apply.
Daily bundles can keep upfront spend low, but repeating them through the month often costs more overall.
Price: R33 | Validity: 1 Day | Approx. value: R22.00/GB
This pick is limited to the recorded once-off smartphone bundles used on this page. Compare larger monthly allowances separately before choosing.
Price: R165 | Validity: 30 Days | Approx. value: R55.00/GB
Night bundles can be strong value when downloads happen in off-peak hours only.
Price: R5 | Validity: 1 Night | Approx. value: R20.00/GB
Start with the 1GB and 2GB views, then compare whether a short-validity bundle or a small monthly bundle fits your real usage better.
Focus on monthly bundles and overall cost per GB rather than the cheapest one-day top-up.
The 10GB and larger monthly bundles usually matter more than the cheapest small bundle headline.
Use the night-data section and dedicated night guide rather than comparing it directly with daytime anytime bundles.
Low price is only part of the decision. Always balance value against network reliability where you actually use your phone.
Comparison scope: cost per GB is bundle price divided by the recorded general-use allowance. Only source-checked, dated rows qualify for this table. The table ranks unit cost across different expiry periods; it does not establish the cheapest way to meet a particular monthly usage target. Row-level checked dates describe the pricing evidence, separately from the page's editorial update date.
Public vs personalised pricing: operator-specific personalised, app and USSD campaign offers can differ by SIM, account history and campaign. They are not treated here as national baseline pricing or included in rankings unless publicly documented.
Before purchase, verify the final bundle on the operator side and use the USSD codes hub or network comparison hub for the next step.
If the intent is best prepaid phone plans, move to the best prepaid phone plans guide. If the query is already operator-specific, such as Cell C data deals, start on the homepage or jump straight to the Cell C data deals page.
Vodacom has the lowest cost per GB among the source-checked, anytime smartphone-data rows in this table with Vodacom Hourly 250MB at about R20.00/GB.
Not always. The lowest upfront price can still be poor value if validity is short or coverage does not fit your real usage pattern.
Personalised, app and USSD campaign offers may differ from public prices, but they are not universal and can vary by SIM, history or campaign. They are excluded from national rankings unless publicly documented.
Compare volume, validity, cost per GB, and whether the bundle matches your actual usage pattern. Do not compare a short-validity promo directly with a 30-day bundle without accounting for repeat purchases.
Author and review notes
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.
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