Supersonic Review
Supersonic is a South African retail ISP that publishes a full no-contract fibre catalogue from R319 a month with free installation and sells 5G AirFibre on the MTN network. It suits a budget-led household that wants the lowest entry price on an uncapped line. The trade-offs are the weakest customer record in the retail-ISP cohort across two platforms, promotional tiers that step up, and no network of its own.
Is Supersonic worth shortlisting?
Only if price and no-contract terms outweigh the worst customer record in the retail-ISP cohort. Supersonic publishes a full fibre catalogue without an address check, from R319 a month for a 10/5 line, month-to-month with free installation, activation and router, and sells 5G AirFibre on the MTN network. Against that, its Google listing sits at 1.1 across 749 reviews and its HelloPeter TrustIndex at 1.5 out of 10 across 648, two platforms agreeing at volume, with price increases and package downgrades in the most recent reviews. Quote it against Webafrica and Afrihost at the same tier and weigh the record before you sign.
- Contact+27 60 068 7377 · supersonic.co.za
- Fibre pricingUncapped fibre from R319 a month (10/5 Mbps, Openserve WebConnect); about 100 packages shown without a coverage check; promotional tiers step up after month four to seven (R339 to R439, for example); month-to-month, free standard installation, free activation, free-to-use router
- ProductsUncapped fibre over partner network operators and 5G AirFibre on the MTN network
- ReviewsGoogle 1.1 across 749; HelloPeter 1.5 out of 10 across 648
The budget retailer: a published no-contract catalogue from R319, on the weakest customer record among South African retail ISPs.
Supersonic’s offer is easy to read, which is rarer than it should be. The fibre page renders about 100 packages without an address check, the cheapest an uncapped 10/5 line at R319 a month on Openserve, and every package is month-to-month with free standard installation, free activation and a free-to-use router. The 5G side runs on the MTN network. Pricing value scores 6.5, held back because several tiers are promotional and step up after month four to seven, and feature set 6.0 because Supersonic owns no network and the range is narrower than Afrihost or Webafrica.
The record is the reason the score is 4.8. The Google listing sits at 1.1 across 749 reviews and the HelloPeter TrustIndex at 1.5 out of 10 across 648, on an active subscription, so this is not an unmanaged-profile artefact. The three most recent Google reviews describe a package downgraded from uncapped to capped with a price increase, a fast phone sign-up and installation, and an LTE cancellation after an unannounced price rise. Customer reviews scores 1.5 and support 3.0; no support hours or response commitment are published.
Is Supersonic likely to suit you?
Tick what applies to your business.
Pros and watch-outs
What Supersonic does well, and where to push back at quote stage.
- A full fibre catalogue published without an address check, from R319 a month for an uncapped 10/5 line.
- Month-to-month on every package with free standard installation, free activation and a free-to-use router.
- 5G AirFibre on the MTN network where fibre is poor or expensive to install.
- Multi-network fibre through partner operators under one account.
- Google 1.1 across 749 reviews and HelloPeter 1.5 out of 10 across 648, two platforms agreeing on a very weak record at volume.
- Several tiers are promotional and step up after month four to seven; the most recent reviews describe price increases and a package downgrade.
- Supersonic owns no network: fibre rides partner operators and 5G rides MTN, and no SLA or uptime figure is published.
- A call-centre number and a complaints page are published, with no support hours or response commitment.
Score breakdown
Five categories that decide whether Supersonic earns a slot on your shortlist. The headline is the weighted sum, so you can check the arithmetic.
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 upward and 5G 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 749 Google reviews. Two platforms agreeing on a very weak signal at volume, with price increases and downgrades in the most recent feed.
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: from R319 a month, no contract, promotional tiers
Supersonic publishes its fibre catalogue on supersonic.co.za without an address check, sampled 4 September 2026. The cheapest package is R319 a month for an uncapped 10/5 line on Openserve, every package is month-to-month with free standard installation, activation and router, and several tiers carry a promotional rate that steps up after month four to seven.
| Line | Published rate | What to check | Disclosure |
|---|---|---|---|
| Uncapped fibre 10/5 (Openserve) | R319 a month | The cheapest package on the page; which network serves your address | Published |
| Promotional fibre tiers | Published per package (R339 stepping up to R439, for example) | The month the promotional rate ends and the steady-state price | Published |
| Terms | Month-to-month; free standard installation, free activation, free-to-use router (T&Cs apply) | Router-return terms and what “standard” installation excludes | Published |
| 5G AirFibre | Published per plan | MTN 5G signal at your address and speed-cap behaviour | Confirm at quote |
| Support SLA | Not published | Fault response time, after-hours route and a named escalation contact | Demand in writing |
What real customers say
The three most recent reviews on the Supersonic Google listing, quoted as written. The listing holds 1.1 stars across 749 reviews; HelloPeter (1.5 out of 10 across 648) is linked in the sources block below.
“This ISP has become an absolute joke. They downgraded my package from uncapped to capped, yet they had the audacity to increase the monthly price. How do you charge customers more while giving them less?”
“Wow wow, super wow! They contacted me at about 2pm yesterday, done the necessary over the phone, no documts no hassles.”
“I will never again use them. I have just canceled our LTE with them. Our data depletes much faster since their price has gone up, without a notice”
How to read this: two of the three are about the bill, a package moved from uncapped to capped while the price rose, and an LTE line cancelled after an unannounced increase; the third praises a same-day phone sign-up. Sign-up works and the account afterwards is where the complaints sit. Get the steady-state price and the notice terms for changes in writing before you pay.
The Supersonic product line
A two-product retail catalogue: fibre over partner networks and 5G on MTN.
Partner networks, published catalogue
Fibre through partner operators, with about 100 packages shown without an address check, from R319 a month, month-to-month with free installation and router.
On the MTN network
Fixed-wireless 5G where fibre is poor or expensive, with signal strength varying by address.
No contract, no setup fees
Month-to-month on every package with free standard installation, free activation and free delivery across the country.
Call centre and complaints page
A call-centre number and a complaints page are published; no hours or response commitment.
Choose Supersonic if
- The lowest entry price on a no-contract uncapped line is your main criterion.
- You want to read every package and price before entering an address.
- MTN 5G is strong at your address and fibre is poor or expensive to install.
- You are prepared to manage the account closely and escalate early.
Consider another if
- A defensible customer record is a shortlist condition; Webafrica and Afrihost publish similar catalogues on far stronger records.
- You need a home or business phone number on the same account; Afrihost carries Pure VoIP.
- You want a brand that owns its network or publishes an uptime figure.
- You need business voice or a contracted SLA.
Alternatives to compare
WhichVoIP partners in Fibre — paying sponsors, independently scored on the same rubric as Supersonic. Worth a quote alongside it.
Centracom
Managed business fibre, 25–1000 Mbps, month-to-month. Listing · Review
Kinetix Connect
Business fibre, microwave and satellite, quoted per site. Listing · Review
Innovo Networks
Dedicated and broadband fibre, plus licensed microwave. Listing · Review
Peers scored on the same rubric sit side by side on Compare fibre providers.
South African essentials
Four local signals to verify before signing.
Supersonic is a retail ISP riding partner fibre operators and the MTN network; the network at your address sets installation and fault times. Verify the operating entity at register.icasa.org.za if procurement requires it.
Not applicable: no voice product is on the catalogue, so no numbers to port. Pair the line with a separate VoIP retailer if you need a number.
A call-centre number and a complaints page are published, with no support hours or response commitment. Given the record, get a named escalation contact before you sign.
Month-to-month with free installation, activation and router. Confirm the month a promotional rate ends, the steady-state price, and the notice terms for price or package changes.
How this score was built
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. Supersonic is not a sponsor, and sponsorship does not move a score.
- Pricing value, 25%Rate transparency, setup friction, contract flexibility
- Feature set, 25%Controls, analytics, integrations, admin usability
- Customer reviews, 20%Aggregate rating and volume on Google and HelloPeter, treated as directional, never definitive
- Reliability and uptime, 15%Infrastructure ownership, hosting location, published uptime evidence
- Support quality, 15%Support hours, location, and what customer reviews say about resolution
FAQ
Short answers for the questions buyers typically ask before requesting quotes.
What is Supersonic?
A South African retail ISP selling uncapped fibre over partner network operators and 5G AirFibre on the MTN network, month-to-month with free installation.
How much does Supersonic fibre cost?
The catalogue starts at R319 a month for an uncapped 10/5 line on Openserve, sampled 4 September 2026, with about 100 packages shown without an address check. Several tiers are promotional and step up after month four to seven.
Is there a contract?
No. Every package is month-to-month with free standard installation, free activation and a free-to-use router.
What do customer reviews say?
Google 1.1 across 749 reviews and HelloPeter 1.5 out of 10 across 648, the weakest record among South African retail ISPs. The most recent reviews describe price increases and a package downgrade, alongside one fast sign-up.
Does Supersonic own its network?
No. Fibre rides partner operators and 5G rides the MTN network. No SLA or uptime figure is published.
Does Supersonic offer voice?
No voice product is on the catalogue.
Sources, disclosure and what changedWhere this review’s facts come from, how WhichVoIP gets paid, and the update history
- supersonic.co.za fibre catalogueUsed for the R319 10/5 entry package, the promotional step-ups, the month-to-month terms and the free installation, activation and router. Rendered 4 September 2026. Open source →
- supersonic.co.zaUsed for the 5G AirFibre product on the MTN network, the contact number and the free-delivery terms. Verified 19 May 2026. Open source →
- Supersonic Google Business ProfileUsed for the 1.1-star rating across 749 reviews and the three verbatim quotes. Read live 6 September 2026. Open source →
- Supersonic on HelloPeterUsed for the 1.5 out of 10 TrustIndex across 648 reviews on an active subscription. Sampled 16 August 2026. Open source →
Supersonic is not a WhichVoIP sponsor. 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.
- 6 September 2026Page rebuilt in the updated review layout. Google listing re-read: 1.1 across 749 (from 689), three most recent reviews quoted verbatim in place of the aggregate cards. Pricing table rebuilt from the 4 September catalogue read (R319 entry, promotional step-ups). Alternatives given reasons; South African essentials rewritten to the four standard checks; journey rail and collapsed sources block added; CTAs routed to the fibre quote form. Score unchanged at 4.8.
- 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.
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