Best 5G Network in Singapore: How the Telcos Actually Compare

The four MNOs at a glance

Before any price comparison, the first thing to understand is that in Singapore your plan name is not your network. GOMO is Singtel. giga! is StarHub. Circles.Life rides on M1. MyRepublic mobile rides on StarHub. If the underlying network in your area is weak, no amount of price-shopping inside that family will fix it.

Who actually runs the network

In 2020 IMDA awarded full nationwide 5G spectrum to two operators: Singtel, and a StarHub-M1 joint consortium. Singtel built its own standalone (SA) 5G network on 3.5 GHz mid-band. StarHub and M1 pooled resources and now operate a shared radio access network through a joint venture called Antina — the same cell towers and antennas serve customers of both brands, with separate cores for billing and policy. That is why, in practice, walking from a Singtel SIM to a M1 SIM at the same spot can feel like switching networks, but walking from a StarHub SIM to an M1 SIM often does not.

Simba — the fourth licensee, formerly TPG Telecom — was awarded a smaller, localised 5G allocation and has been rolling out its own 5G across the island progressively. It uses a mix of 2.1 GHz refarmed spectrum and mid-band where available. The pricing reflects its position as the disruptor: consistently the cheapest unlimited-style plans on the market, with the trade-off of thinner indoor coverage in older buildings, basements and the deeper parts of the MRT network.

Everyone else you see advertised — GOMO, giga!, Circles.Life, MyRepublic, Zero1, redONE, Eight Telecom, and the various lifestyle SIMs at Sheng Siong or 7-Eleven — is an MVNO or digital sub-brand. They do not build networks. They wholesale capacity from one of the four MNOs and re-package it with different pricing, customer service and apps. Knowing which underlying network you are buying is the single most important variable for whether the plan will feel fast or laggy where you live and work.

What 5G coverage really looks like

Singapore is a small, dense country, and on paper all four MNOs now claim "island-wide" standalone 5G. That headline is broadly true but obscures real differences. Among long-time mobile users, the dominant view is straightforward: Singtel's native 5G is the most consistent network in the country. If that one is "slipping" in your area, there is no domestic operator that will be materially better — the cause is almost always local, not strategic.

• Outdoor, line-of-sight, central districts. All four networks deliver real 5G speeds — typically 300–700 Mbps downlink on a good handset, occasionally over 1 Gbps in CBD pockets. You will not notice a meaningful difference between them here.
• Indoor in older HDBs and shophouses. Mid-band 5G (3.5 GHz) does not penetrate concrete walls as well as 4G. Singtel and StarHub-M1 have denser small-cell deployments in mature estates. Simba is still catching up; users in older Toa Payoh, Queenstown or Jalan Besar blocks sometimes see the phone fall back to 4G indoors.
• StarHub 5G outside the CBD. A recurring complaint from StarHub-native subscribers is that the handset reverts to 4G in non-central areas even though the coverage map shows full 5G — particularly in residential heartlands and some Outram, Tiong Bahru and West Coast pockets. The coverage-map-versus-reality gap is large enough that prospective StarHub-5G buyers should sample the SIM in their own neighbourhood before committing to a contract.
• Deep MRT tunnels and basements. 5G underground is a project, not a fact. Coverage is being installed line by line and many sections still hand off to 4G. The Thomson-East Coast Line and newer Cross Island Line stretches have the best coverage. Older Circle and East-West sections are patchier. Above-ground stations are not automatically safe either — Simba subscribers regularly report drop-outs at Redhill MRT, an outdoor station on the East-West Line.
• Sentosa, Tuas, Jurong Island, offshore. Singtel tends to be the most reliable for industrial and outer-island use. Simba is weakest here. For users who work in petrochemicals, port logistics or wafer fabs, this matters more than the headline plan price.
• The Causeway and Johor Bahru roaming. If you cross over often, redONE's deep integration with Malaysian networks and M1's data-roaming bundles are commonly the most economical.

If your current Singtel connection is "slipping", it is usually one of three things: a small cell that has gone faulty in your area, congestion at peak hours on a busy node, or your handset clinging to a weak 5G signal when 4G would actually be faster. Before assuming the carrier is the problem, try toggling 5G off for a day in your home area and see if things feel snappier. If yes, the issue is local 5G coverage rather than the operator overall — and the honest read is that no other domestic operator will be a step up. The other three networks may match Singtel in your specific area, but none consistently beats it.

The value tier: GOMO, giga!, Simba and the MVNOs

If the priority is reliable 5G at the lowest sensible monthly cost — the "good value, not premium" bracket — this is the segment to shop in. Pricing moves often, so treat these as bands rather than fixed numbers.

For a user coming off Singtel and looking for value without paying premium, the obvious-looking swap is GOMO. The catch: GOMO sits on Singtel's network but is widely reported to be deprioritised relative to native Singtel under load — a kind of "second-tier Singtel." Most days the difference is invisible; under congested cells it shows up. If the reason you are leaving Singtel is that the connection feels degraded, dropping to GOMO usually preserves the problem and lowers the bill at the same time. Better tests: pick up a one-month Simba or Circles.Life prepaid, run it alongside your existing line, and walk your real routes — your block, your office, the food court you actually pay at — before porting. Simba comes with frequent SGD 40 promo credits that make this trial close to free.

Mid-tier plans for normal heavy users

Mid-tier plans (roughly SGD 30–45 per month) tend to add three things on top of the value bracket: more data (often badged as "unlimited" with a fair-use cap), free roaming in select countries, and bundled subscriptions like Disney+ or HBO. For most professionals who tether occasionally and stream on the commute, this tier hits a comfortable middle.

• Singtel SIM-only mid plans — the most predictable 5G performance in the segment. Comes with the Singtel ecosystem (Dash, CAST, family lines) that some users care about and most do not.
• StarHub SIM-only mid plans — bundles Disney+ aggressively. 5G performance in central districts is competitive; outside the city the user experience is mixed enough that prospective buyers should trial the SIM in their actual neighbourhood before signing.
• M1 mid plans — usually competitive on data quotas and roaming inclusions. Same underlying RAN as StarHub, different value-adds.
• Simba unlimited-style plans — the cheapest way to get genuinely uncapped 5G, but accept the indoor caveats noted above.

Premium plans: when they make sense

Plans above SGD 60 a month are aimed at a specific set of users: heavy international roamers, family-line aggregators, and people who want a flagship handset bundled into a 24-month contract. The premium tier is not about better domestic 5G — the radios are the same — it is about everything around the connection.

• Built-in unlimited roaming in 20+ destinations is the most defensible premium feature. If you fly monthly, the maths can work.
• Family aggregation — Singtel and StarHub both let you pool data across multiple lines, sometimes with shared device subsidies.
• Handset subsidy — looks attractive on the shopfloor but is essentially a 0% loan baked into the bill. Always compute it as a separate number from the SIM-only equivalent before signing.
• Concierge customer service — relevant if you have ever spent an hour on hold with a digital sub-brand.

If none of those four apply to you, you are paying for branding.

How to choose by use case

Switching networks without losing your number

Singapore mobile number portability is mature and free. The number you have used for fifteen years moves with you in roughly an hour, with no day-of-the-week downtime. The actual process:

1. Choose the new plan and order the SIM (physical or eSIM). Digital brands ship same-day or next-day. Retail brands often activate on the spot.
2. Initiate the port through the new operator's app or onboarding flow. You will be asked for your existing line's NRIC/FIN and a one-time approval — usually an SMS code on the existing line.
3. Wait for the cutover. It typically completes within an hour during business hours. Your old SIM goes inactive once the new one activates; you do not need to call the old telco to cancel.
4. Restore eSIM on devices if you carry Apple Watch with cellular, etc. — those need to be re-paired with the new line.
5. Check final bill. If your old plan was on contract, you may owe a prorated termination charge. SIM-only contracts have zero exit cost; bundled-handset contracts can be expensive to break early.

Pitfalls to watch

• Confusing the brand with the network. Buying a StarHub-family plan when StarHub-M1's tower is the weak one in your area will not help. Identify the underlying network before optimising for price.
• "Unlimited" means fair-use. Every "unlimited" 5G plan in Singapore has a soft cap somewhere — typically 100–500 GB depending on the operator — beyond which speeds are throttled. For most users this is irrelevant; for a serious tetherer it is the whole game.
• MVNOs get deprioritised under congestion. When a cell is overloaded, native-brand customers get scheduled first and MVNO customers wait. In normal conditions this is invisible; in a crowded NDP/F1 weekend in town it shows up.
• Handset 5G band support. Older phones (especially grey-import models from a different region) may not support Singapore's 3.5 GHz n78 band properly. Check your handset spec sheet before assuming your new plan will give you 5G.
• Indoor coverage promises. Marketing maps show outdoor coverage. The only test that matters is walking around your living room, your office and your commute holding a candidate SIM. Use a one-month prepaid before porting.
• Auto-renewing contracts. Many "promo" plans revert to a higher rate after 12 months. Diary the renewal date and re-shop annually — competition in this market is intense enough that loyalty rarely pays.

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