Supersonic Review
A buyer-focused review of Supersonic – the SA multi-product ISP offering uncapped fibre and 5G AirFibre internet powered by MTN’s 96% network coverage, with month-to-month terms, free installation and uncapped fibre from R319 per month.
Is Supersonic worth shortlisting?
Possibly, for budget-led SA households looking at uncapped fibre or 5G AirFibre with no fixed-term contract and free installation. Supersonic is powered by MTN’s network on the 5G side and partners with top fibre providers on the FTTH side, with uncapped fibre from R319 per month. The procurement caveat is significant: the corporate Google Business Profile shows heavy customer-service dissatisfaction at 1.1 stars across 689 reviews. Compare against peer retail ISPs (Afrihost, Webafrica, Cool Ideas, Axxess) on both price and service signal before signing up.
- Phone+27 60 068 7377
- ProductsUncapped Fibre + 5G AirFibre internet
- Network backingPowered by MTN with 96% coverage on the wireless side; multiple SA fibre operators on the FTTH side
- Commercial modelFree installation, free activation, no fixed contracts, free delivery across SA
An affordable multi-product retail ISP with MTN-grade 5G reach – weighed honestly against a heavy customer-service signal on the public Google feed.
Supersonic positions itself as the budget-led SA retail ISP for uncapped fibre and 5G AirFibre on a month-to-month basis with free installation. The 5G coverage story is strong on paper because the network is powered by MTN at 96% reach, and fibre is delivered through partner operators. Fibre from R319 per month for a 10/5 Mbps line is competitive against peer retail ISPs, with promotional tiers that step up after the first months. The procurement caveat is the public-service signal: 1.1 stars across 689 Google reviews at the corporate Supersonic listing – one of the lowest aggregate ratings at meaningful scale we’ve seen in the SA retail ISP cohort. The catalogue and pricing make Supersonic shortlist-worthy for budget buyers; the public review pattern means buyers should walk in with an escalation contact in their phone and a procurement comparison against peer brands.
Is Supersonic likely to suit you?
Possible fit: pricing is attractive but compare peer-brand service signals carefully.
Pros and watch-outs
What Supersonic does well, and where the public-service signal shapes the procurement decision.
- Uncapped fibre from R319 per month on a 10/5 Mbps line, with the full package catalogue visible on the site before any address check. Free installation, free activation and a free-to-use router.
- 5G AirFibre powered by MTN with 96% network coverage – meaningful wireless reach for households where fixed fibre is poor, missing or expensive to install.
- Multi-FNO retail on the fibre side – Supersonic partners with top SA fibre operators rather than running its own network, giving buyers access to multiple underlying networks under one Supersonic account.
- Month-to-month commercial model with no long-term contracts – the consumer-flexible terms peer retail ISPs (Afrihost, Webafrica, Axxess) carry as standard.
- Public-review signal at the corporate Google Business Profile sits at 1.1 stars across 689 reviews – one of the lowest aggregate ratings at this volume in the SA retail-ISP cohort. The meaningful sample size makes this hard to dismiss as a small-volume noise pattern.
- Several fibre tiers are promotional – the advertised rate steps up after month four to seven (for example R339 rising to R439). Read the small print on the package card and run the address check, because not every provider is available at every address.
- MTN coverage is meaningful but address-specific – the 96% coverage figure is provider-disclosed at the network level and varies in practice. Verify 5G signal strength at your specific address before locking the AirFibre tier.
Score breakdown
Five categories that decide whether Supersonic is the right retail ISP for your address – weighted to the buying evidence a South African household actually uses.
The fibre page shows a full catalogue without an address check, from R319 a month for a 10/5 Mbps line, month-to-month with free installation, activation and router. Held back because several tiers are promotional and step up after month four to seven.
Uncapped fibre over partner operators from 10 Mbps to 1 Gbps, 5G home internet and AirFibre on the MTN network under one account. Held back because Supersonic owns no network and the range is narrower than multi-product retail peers.
HelloPeter TrustIndex of 1.5 out of 10 across 648 reviews and 1.1 stars across 741 Google reviews, both sampled 16 August 2026. Two platforms agreeing on a very weak signal at volume.
A retail ISP riding MTN for 5G and partner operators for fibre; the MTN backing is the only reliability evidence. No SLA or uptime figure is published.
A call-centre number and a complaints page are published, with no support hours or response commitment. Both review platforms point to weak resolution at scale.
Pricing – fibre from R319 per month, no fixed contract
Supersonic publishes its full fibre catalogue on supersonic.co.za without an address check: the cheapest package is R319 per month for a 10/5 Mbps uncapped line, and several tiers carry promotional rates that step up after the first months. Free installation and free activation apply across the catalogue; no fixed-term contract on any product.
| Cost area | Published rate | Buyer question | Risk level |
|---|---|---|---|
| Entry-tier uncapped fibre | From R319 per month (10/5 Mbps) | What speed tier sits at the entry price and which medium (fibre or 5G)? | Published |
| Higher-speed fibre tiers | Address-gated | Which fibre operator at my address + speed tier + monthly rate? | Address-gated |
| 5G AirFibre tiers | Address-gated | MTN 5G signal strength + speed cap behaviour at my site? | Address-gated |
| Installation + activation | R0 (free) | Standard install lead time + activation paperwork? | Published |
| Router delivery | R0 across SA | Plug-and-play pre-configured router? | Published |
| Contract term | Month-to-month | Cancellation terms + notice period? | Published |
What real customers say
The Supersonic corporate Google Business Profile sits at 1.1 stars across 689 reviews – one of the lowest aggregate ratings at meaningful scale we’ve seen in the SA retail-ISP cohort. The volume is meaningful enough that the dissatisfaction signal is hard to dismiss as small-sample noise.
1.1-star rating across 689 reviews on the corporate Supersonic listing – among the lowest aggregate ratings at this volume in the SA retail-ISP cohort. Honest read: the volume is meaningful and the pattern is concentrated.
“Powered by MTN with 96% coverage” – provider-disclosed wireless-network backing. Operational scale on the 5G side comes from the underlying MTN network, separate from the retail-side customer-service signal.
“No hidden installation or activation fees. Free delivery across South Africa. We handle everything; just plug in your router and start using it.” – provider-disclosed commercial terms that reduce up-front friction for budget-led households.
Buyer move: weight the 1.1-star aggregate honestly – this is the dominant public-service signal. Quote Supersonic against peer retail ISPs (Afrihost 4.7★ / 74,807, Webafrica 4.4★ / 69,467, RSAWEB 4.7★ / 25,491, Axxess 4.5★ / 5,755) at the same speed tier and weigh the price advantage against the service signal.
The Supersonic catalogue
A narrow two-product retail ISP catalogue – uncapped fibre via partner operators plus 5G AirFibre powered by MTN.
Multi-FNO retail via partner operators
Uncapped fibre delivered through partner SA fibre network operators. Buyer transacts with Supersonic for the retail account and gets the underlying network coverage available at their specific address.
Powered by MTN at 96% coverage
Fixed-wireless 5G internet running over the MTN network. Provider-disclosed 96% coverage at the network level – useful where fibre is poor or expensive to install. Address-specific signal strength varies in practice.
No long-term contracts
“Your plan, your terms, your rules.” Month-to-month payments with no fixed-term commitment across the catalogue – the consumer-flexible terms peer SA retail ISPs typically carry.
No hidden up-front fees
Free installation, free activation, free delivery across South Africa. “We handle everything; just plug in your router and start using it.” Reduces up-front friction for budget-led households.
Uncapped fibre from R319pm
One hundred fibre packages from 10 Mbps to 1 Gbps are listed on the site with the monthly rate on each card, starting at R319 per month. Promotional tiers show the rate they step up to and the month it changes.
Public availability check on supersonic.co.za
Public address-availability check on the home page surfaces actual coverage and rates for your specific address. The pricing detail beyond the entry headline sits behind this check.
You’re a budget-led SA household and the entry-tier price + free install matter more than peer-brand service track record.
- You’re looking at uncapped fibre or 5G AirFibre at the cheapest entry tier on the SA retail ISP market.
- Your address has solid MTN 5G coverage and fibre is poor, missing or expensive to install.
- Free installation, free activation and free delivery materially reduce your up-front cost.
- You’re comfortable planning a service-escalation path before signing, given the public review signal.
Your situation falls outside what Supersonic is built for – another SA retail ISP will fit better.
- Public customer-service track record is a primary decision factor: Afrihost (4.7★ / 74,807), Webafrica (4.4★ / 69,467), RSAWEB (4.7★ / 25,491) or Axxess (4.5★ / 5,755) carry stronger aggregate signals.
- You want bundled phone calls + 5G WiFi under one brand: Rain’s rainOne tiers are positioned around that exact bundle structure.
- You need a broader multi-product portfolio (fibre + voice + hosting + mobile data): Afrihost or Axxess carry the wider catalogue.
- You need an enterprise stack alongside the line: RSAWEB or Skywire carry business-side cloud + DC + security.
Alternative providers to compare
Three SA retail ISPs worth quoting alongside Supersonic at your address.
Afrihost
Multi-product SA ISP with the strongest customer-feedback evidence (4.7★ / 74,807 reviews). Fibre + LTE + 5G + Pure VoIP + web hosting on a single brand, with 8 MyBroadband ISP-of-the-Year wins.
Axxess
5G/LTE home internet across all three SA mobile carriers (MTN, Vodacom, Telkom) under one Axxess account, plus fibre and Axxess Voice. Carrier-choice flexibility Supersonic doesn’t offer.
rain
SA 5G mobile-broadband challenger with rainOne Home (R679 + 2 phones) and rainOne Work (R869 + 5 phones) bundles. Different bundle structure to Supersonic’s per-line model.
South African essentials
Four SA-specific signals to verify before signing.
Supersonic operates as a licensed SA electronic communications service (ECS) provider. Verify the operating-entity name at register.icasa.org.za if procurement requires it.
Use the public address-availability check on supersonic.co.za to confirm fibre and 5G coverage at your specific address before assuming the entry-tier price applies to you.
The 96% coverage figure is the MTN network-level claim. Individual address signal strength can vary – ask Supersonic for a verified MTN signal check at your site if the 5G AirFibre tier is on your shortlist.
Given the dominant public-feed dissatisfaction signal, get a named escalation contact during signup and save it in your phone before the line goes live.
Sources and disclosure
Where this review’s facts come from, and how WhichVoIP gets paid – both transparent before you act on any of it.
- supersonic.co.zaUsed for the product structure (uncapped fibre + 5G AirFibre), the fibre catalogue and R319 per month entry pricing (re-read 4 September 2026), “Powered by MTN with 96% coverage” backing, fibre-partner relationship, free installation + activation + delivery policy, and the no-fixed-contract commercial model. Verified live 4 September 2026.
- Supersonic Google Business ProfileUsed for the 1.1★ / 689 aggregate rating and the +27 60 068 7377 contact number. Open source →
- Prior review baselineUsed for the 2024 publication context and the multi-product retail-ISP positioning continuity.
- 4 September 2026Re-scored on the five-dimension rubric (pricing value 25%, feature set 25%, customer reviews 20%, reliability and uptime 15%, support quality 15%) from 6.1 to 4.8. Customer reviews now reads the HelloPeter TrustIndex and Google rating recorded in the WhichVoIP record (1.5 out of 10 across 648; 1.1 stars across 741; sampled 16 August 2026). Fibre catalogue re-read at supersonic.co.za on 4 September 2026: packages start at R319 a month, so the R199 entry price this page carried since May has been replaced throughout with the current R319 figure, and the pricing table now reflects the catalogue being visible without an address check.
- 19 May 2026Score recalibrated from 6.5 to 6.1 against the updated 4-axis rubric. Support & Reliability dropped to 4.0 on the honestly-surfaced 1.1★ / 689 GBP signal. Pricing 7.5 reflects the R199pm entry tier + free install. MTN-powered 5G AirFibre and multi-FNO fibre framing surfaced in place of the prior generic “wireless ISP” positioning.
Disclosure: This review was researched and written by WhichVoIP’s editorial team using primary sources (provider website, Google Business Profile, and prior review baseline). WhichVoIP may receive a referral fee when you request quotes through our platform. Read our full editorial policy.
How this score should be read
Scores are editorial guides, not guarantees. Supersonic’s 4.8 is the weighted sum of the five dimension scores above: 0.25×6.5 + 0.25×6.0 + 0.20×1.5 + 0.15×6.0 + 0.15×3.0. Sponsorship has never moved a score on this site, and Supersonic is not a sponsor.
- 25%Pricing value, including commercial transparency, contract flexibility and quote-process friction.
- 25%Feature set, including portfolio depth, integrations and admin usability.
- 20%Customer reviews, measured as a standing against other South African providers on the same review platform, adjusted for how much evidence supports it.
- 15%Reliability and uptime, weighted toward providers that own or fully control their network rather than reselling.
- 15%Support quality, weighted toward customer-review patterns rather than provider claims about SLAs.
FAQ
Short answers for the questions buyers typically ask before requesting quotes.
What is Supersonic?
A South African multi-product retail ISP offering uncapped fibre (via partner fibre network operators) and 5G AirFibre internet powered by MTN’s network at 96% coverage. Uncapped fibre from R319 per month, no fixed-term contracts, free installation and activation.
Is Supersonic owned by MTN?
The Supersonic site discloses that the network is “Powered by MTN” with 96% coverage on the 5G AirFibre side. Corporate ownership disclosure beyond the MTN partnership isn’t surfaced on the home page – ask the sales team if ownership structure is material to your procurement.
How much does Supersonic cost?
The cheapest fibre package on supersonic.co.za is R319 per month for a 10/5 Mbps uncapped line, and the full catalogue is listed with rates before any address check. Free installation, free activation and free delivery apply across the catalogue.
Why is the Google rating so low?
The corporate Supersonic Google Business Profile shows 1.1 stars across 689 reviews – one of the lowest aggregate ratings at meaningful scale in the SA retail-ISP cohort. Weigh this against the price advantage and quote Supersonic alongside peer retail ISPs (Afrihost, Webafrica, RSAWEB, Axxess) before signing.
Does Supersonic offer voice or VoIP?
No – Supersonic’s current catalogue is fibre + 5G AirFibre only. If you need a home phone number alongside your connection, pair Supersonic with a separate VoIP retailer (Afrihost Pure VoIP, Axxess Voice) or use OTT calling apps.
How does Supersonic compare to Afrihost?
Both are SA retail ISPs. Supersonic leads on entry-tier fibre price (from R319pm) and 5G coverage backing through MTN. Afrihost leads on customer-feedback evidence (4.7★ / 74,807), product breadth (Pure VoIP + web hosting + mobile broadband + multi-FNO fibre) and industry award track (8x MyBroadband ISP of the Year). Pick on what you weight more heavily.