1TB SIM-Only Plans in Singapore

A terabyte of mobile data is a number that sells plans. It appears on plan cards, on banners and in comparison tables, and it does not always mean the same thing twice. Across the 49 SIM-only plans recorded from eight Singapore providers on 21 September 2026, seven provide at least 1TB of base or permanent local allowance. They come from four providers: GOMO, M1, Circles.Life and giga!.

That count is smaller than the number of plans a shopper will see advertised with 1TB on them, and the gap is the reason this page exists. One provider sells a plan named for a terabyte whose allowance steps down to 700GB, and 700GB is the figure this page shows for it. One publishes 700GB of local data beside a 700GB regional bonus, which a careless table turns into 1.4 terabytes and this one does not. Several publish unlimited data and no figure at all. Each of those is a different claim, and only some of them survive a rule stated in advance.

This is a comparison rather than a ranking. There is no first place, no overall pick, and no plan described here as the lowest-priced or the strongest, because the published figures do not support any of those claims — six of the eight providers publish nothing about activation, SIM or delivery charges, and not one of the eight states whether its prices include GST. What the evidence does support is a rule, a table of the plans that pass it, and a plain account of everything the rule keeps out.

One more thing before the table, because it is the most useful sentence on this page: most people reading it do not need a terabyte. A terabyte is 1,024GB. Someone using 40GB a month spends under four per cent of it and pays for the rest. The choosing guide below takes that question seriously instead of assuming the answer.

A plan is listed here as a 1TB plan only if the provider publishes at least 1TB as the base allowance, or as a permanent change to it. The rule is stated before the table rather than after it, because a rule written to fit a list is not a rule.

A permanent uplift does qualify, and that distinction is not a technicality. M1 publishes its allowance as 1TB against a usual 300GB and describes it as forever. That is a new base allowance with no published end, which is a different product from a bonus that runs three months. Where a provider publishes an uplift that way, the uplifted figure is the base, and the table shows the provider’s own wording so a reader can see which kind they are looking at.

One consequence of withholding temporary figures is worth stating plainly, for the same reason: it removes no plan from the table. Every plan that qualifies on a base or permanent allowance still qualifies, and the count given above is the count you would see if every campaign in the file were on display. What withholding changes is the charge printed beside a plan, and the allowance printed against the step-down row further down — never whether a plan is here at all.

An unlimited plan is not obviously a 1TB plan, and it is not obviously not one. The decision taken here is to include an unlimited plan when the provider publishes a fair-use ceiling at or above 1TB, and to leave it out when no ceiling is published at all. In this file that admits the Infinity tiers published by GOMO, whose own FAQ sets the ceiling at 1,024GB of local data, with talk and SMS capped at 1,500 and lower speeds beyond. 1,024GB is exactly 1TB read in binary and more than 1TB read in decimal, so under either convention the published allowance is at or above the threshold, and it is permanent rather than promotional.

The other side of the same decision is six plans sold as unlimited local data with no published fair-use ceiling of any kind: StarHub’s Unlimited+ Core at $38.00 per month, StarHub’s Unlimited+ Plus at $48.00 per month, StarHub’s Unlimited+ Max at $78.00 per month, Singtel’s 5G+ Enhanced Core at $40.00 per month, Singtel’s 5G+ Priority Plus at $55.00 per month and Singtel’s 5G+ Priority Ultra at $80.00 per month. They are not in the table. The reason is narrow and worth being honest about: they may well deliver more than a terabyte, but no published figure exists to check, and this page lists plans by what their providers publish rather than by what is likely. Absent is not zero, and it is not unlimited either — it is absent. A reader who considers an undisclosed ceiling better than a disclosed one can read those plans back in from this paragraph; the evidence for doing so is stated here rather than hidden in a filter.

Every price, allowance, billing period and term below was read from the provider’s own page on 21 September 2026, first-party, as part of a single extraction covering 8 providers and 49 plans. No figure on this page was taken from memory, from an aggregator or from a comparison site, and no provider was re-checked for this article: the same recorded evidence that supports the wider SIM-only comparison supports this one, filtered by the rule above.

The filtering is done in code rather than by eye. Each plan’s published allowance string is read, one figure at a time, and compared with the threshold; a plan the research file flags as having a time-limited base allowance is rejected before its opening figure is even considered. That matters for one row in particular, because that provider’s allowance string opens with a figure at the threshold before stepping below it, and a rule applied by reading the first number would have let it through.

Where a provider does not publish a field, this article says it is not published. It does not record it as zero, none or absent, because those are three different claims and the page supports none of them. Two extraction limits carry over and are stated rather than papered over: StarHub’s store offers five plan families and only the Unlimited+ family was extracted, so no Platinum, Senior, Data Only or Lite plan appears here at all; and giga! offers a six-month billing option alongside its monthly view, of which only the monthly view was read, with the six-month prices neither established nor derived by multiplying.

Seven plans from four providers, in no particular order. Seven columns: what recurs, how often it recurs, the allowance in the provider’s own words, why the plan passes the rule, where the allowance can be spent, what shape the roaming takes, and whether a contract is published. The charge shown is the standard recurring one, which is the only kind of charge on this page.

Two things in that table repay a second look. The recurring charges run from $17.95 to $50.00 a month and the charge does not track the allowance: Circles Ultra from Circles.Life carries the largest published figure in the set at 2TB and is not the highest charge in it. And the allowance is not always a local one — giga! publishes its terabyte as a single pool usable across Singapore and Malaysia, which is one allowance spent in two countries rather than a local allowance with roaming attached to it.

Beyond the seven columns, each qualifying plan publishes a handful of terms that do not compare cleanly across providers and are therefore listed rather than tabulated. Where a field is missing from the provider’s page it says so: eSIM in particular is recorded as not published for a plan that does not state it, which is a fact about the page rather than a fact about the plan.

These are real products, and a reader may well want one. They are held out of the table above because they are not ongoing 1TB plans, not because they are bad, and they are shown here rather than dropped so that a reader who has seen one advertised can see what happened to it. In each row the allowance given is the one that lasts, not the one on the name.

MyRepublic’s plan named 1TB is the reason this section exists. The provider publishes the allowance as stepping down to 700GB, at $14.95 per month, and the step-down is its own published term rather than something inferred here. So the durable product is a 700GB plan at the same charge, which is a perfectly ordinary plan and not the one the name describes — and 700GB is what this page shows for it in every position, including its row above. MyRepublic’s 500GB plan is flagged the same way and is included for completeness: its allowance is published as running for a stated period, and what it becomes afterwards is not published at all, so no durable figure is given for it and none has been guessed.

MyRepublic’s mobile homepage also carries banner offers whose prices and allowances do not reconcile with each other or with its own plan grid. They are campaign claims with no stated end, and they are not reproduced here, so the figures above are the grid’s. The contradiction itself is worth knowing about — it is the provider’s own, on its own site — and the practical consequence for a reader is that a banner figure on that site may match no plan you can actually buy.

One plan in the file reaches a terabyte only if two separately published allowances are added together, and adding them is exactly the mistake this page is built to avoid:

The same caution applies in the other direction to the multi-country pools. SIMBA’s largest row publishes 800GB usable across Malaysia, Indonesia, Thailand, Hong Kong and Singapore, and giga!’s gigaFLEX+ publishes 800GB across Singapore, Malaysia, Indonesia and Thailand. Neither reaches a terabyte, neither is topped up to one by counting a roaming allowance beside it, and neither appears above. SIMBA publishes no plan at or above 1TB at all, which is also why every row in the qualifying table happens to be billed per month: SIMBA is the provider that bills per 30 days and per 90 days, and none of its rows clears the threshold.

Four further plans meet the allowance rule and cannot be bought by a general reader. They are held apart rather than mixed into the comparison above, because a price a reader cannot access is not a price they can compare against, and because several of them are charged well below anything in the general table for reasons that have nothing to do with the product.

The restrictions are published to different standards, and the difference is recorded rather than smoothed. GOMO states its conditions precisely: aged 60 or older for the Senior plan, aged 16 to 24 for the Student and NS plan. M1 publishes its Silver tiers under exclusive silver benefits without stating a qualifying age on the grid, so no age is asserted for them here. The charges shown are the ordinary recurring ones. Most of these rows are also being discounted for an opening period, and the discounted figures are not shown: one provider’s runs for a year, which is the longest such window in this file and is still a window, after which the charge in the table is what is billed.

The first question is not which terabyte plan to buy. It is whether a terabyte is the thing being bought. A terabyte is 1,024GB. Streaming an hour of high-definition video costs roughly 3GB, so a terabyte is several hundred hours of it; a month of ordinary messaging, maps, music and browsing does not come close. The same file records plans with far smaller allowances at lower recurring charges — the smallest published anywhere in it is 100GB at $10.90 per month from giga! — and for a reader who uses 40GB a month, the extra allowance is not a benefit. It is a number on a card.

Check your own usage before anything else. Every provider shows it in its app, and a three-month average is more informative than any table on this page. If that average sits comfortably under a hundred gigabytes, this article has told you what you needed to know and the rest of it is for somebody else: someone tethering a household, someone working from a hotspot, someone with no fixed line at home. Those readers exist, and for them the questions below are the ones that matter.

Every figure on this page was read first-party from the pages below on 21 September 2026. No secondary source, aggregator or comparison site contributed a price, an allowance or a term. Providers with no plan at or above 1TB are listed too, because the fact that they publish nothing qualifying is itself a finding and a reader should be able to see which pages were looked at.

Three providers are recorded as having ceased Singapore consumer operations and do not appear above: Changi Mobile (to February 2026), Geenet Mobile (to December 2025), redONE Mobile SG (to June 2026). They are kept on record because a provider that existed last year is not evidence that it exists now.

Research and drafting were AI-assisted. Every figure was checked against the named provider’s own page, no figure was taken from memory, and the named editor is accountable for accuracy regardless.