An M1 SIM only plan starts at S$14.95 a month for 150GB of 5G data on no contract, and M1's loudest offer puts a full 1TB of data in front of you for the same S$14.95. The catch is that the S$14.95 on the 1TB plan is a three-month intro price that reverts to S$17.95, and that detail is missing from most headline ads. This guide lays out what each M1 SIM-only tier costs once the promo lapses, what the weekend-data and roaming clauses really mean, and the price points where a cheaper telco quietly wins. All figures are M1's published rates as of June 2026.
A SIM-only plan gives you data, calls and texts on a SIM card with no phone attached and no two-year lock-in. You bring your own handset, pop in the M1 SIM or activate an eSIM, and you can cancel any month without an early-termination fee. That is the whole appeal: you stop subsidising a phone you already own through an inflated monthly bill.
M1 runs these under its Bespoke line, which lets you start from a base allowance and bolt on extras like roaming. Every current M1 SIM-only plan rides the operator's own 5G network rather than reselling capacity, which matters because the four MVNOs that rent M1's network (the budget brands) sit a notch lower in network priority during congestion.
If you are still weighing SIM-only against a phone contract or a budget MVNO, our broader SIM-only comparison for Singapore runs the same numbers across GOMO, Circles.Life and SIMBA so you can see where M1 lands.
M1's SIM-only range collapses into three tiers. The honest way to read them is by the price you pay from month four, because the first-three-months figure is a sign-up sweetener, not the rate you live with.
The table below shows M1's published prices as of June 2026. The intro price applies for the first three months to new sign-ups and port-ins; after that the standard monthly rate kicks in. All three tiers run on 5G, carry no contract, and include 1,000 local minutes and 1,000 SMS.
| Plan | Intro price (first 3 months) | Standard price | Data | Weekend data | Contract |
|---|---|---|---|---|---|
| 150GB 5G | S$11.95 | S$14.95 | 150GB 5G | Unlimited, first 12 months | None |
| 1TB 5G (most aggressive) | S$14.95 | S$17.95 | 1TB (1,024GB) 5G | Unlimited, first 12 months | None |
| 1TB 5G + roaming | S$17.95 | S$22.95 | 1TB 5G + 1GB worldwide roaming | Unlimited, first 12 months | None |
Three clauses decide whether the headline price is real for you. Skip them and you will quietly overpay or hit a wall you did not plan for.
The S$14.95 you see splashed across the 1TB plan holds for three billing cycles. From month four you pay S$17.95. Over a full year that is S$14.95 for three months plus S$17.95 for nine, so the real twelve-month average is about S$17.20 a month, not S$14.95. Budget against the standard rate, not the banner.
The unlimited weekend data that makes the 1TB plan look bottomless runs for the first 12 months only. After a year it drops off unless M1 renews the promotion, and your usable allowance falls back to the plan's base data. For most people 1TB is already more than they will ever use, so this rarely bites, but it is not a permanent feature.
Only the top tier bundles 1GB of worldwide roaming. On the cheaper plans, roaming is a separate purchase: M1 sells data-roaming passes by destination, typically from S$15 a month per country across 70-plus destinations. If you travel a few times a year, a travel eSIM usually beats M1's roaming on price; our eSIM guide for Singapore breaks down when each option wins.
M1's 1TB intro deal is genuinely competitive for heavy users, but at the standard S$17.95 it sits in the middle of the pack rather than at the bottom. The budget MVNOs undercut it for anyone who does not need a terabyte. The table compares M1's standard 1TB rate against the cheapest no-contract plans on the market as of June 2026.
Prices and promos on these plans move month to month, so treat the figures as a snapshot. The pattern, though, is steady: if you burn through 300GB or more you want the M1 1TB plan; if you sip 100GB, you are paying for headroom you will never touch and a sub-S$10 plan does the job.
| Provider | Plan | Standard price | Data | 5G |
|---|---|---|---|---|
| M1 | 1TB 5G | S$17.95 | 1TB | Yes |
| SIMBA | SuperRoam 10 | S$10.00 | 500GB | Yes |
| Singtel hi! | Monthly | S$12.00 | 500GB | Yes |
| GOMO | 5G+ (post-promo) | S$18.33 | 300GB | Yes |
| Circles.Life | 5G Ultra | S$27.00 | 1TB | Yes |
You can keep your existing mobile number through Mobile Number Portability (MNP). Sign up online at m1.com.sg or at an M1 shop, choose the port-in option, and M1 handles the request with your old telco. Activation of the M1 SIM or eSIM usually completes within one business day, and M1 sends an SMS when porting starts and again when it finishes.
Two things to clear before you switch. First, finish or check the contract on your existing line, because porting out early can trigger an early-termination charge from your current provider, not from M1. Second, if the number is registered under someone else's name, you need their original ID and a signed Letter of Authorisation, which M1 publishes on its site.
Switching telcos is one of the lowest-effort wins in a household budget. If you want to see where the freed-up cash could go, drop the monthly saving into our savings goal calculator and watch how a S$15-a-month difference compounds over a few years.
M1 SIM-only plans start at S$14.95 a month for 150GB of 5G data. The headline 1TB plan is S$14.95 for the first three months as an intro price, then reverts to S$17.95 a month. The 1TB plan with bundled roaming is S$22.95 standard. All are no-contract, as of June 2026.
Only for the first three months. The S$14.95 is an intro price for new sign-ups and port-ins. From the fourth month the plan reverts to its standard S$17.95 a month, making the real twelve-month average around S$17.20. Budget against the standard rate, not the promo banner.
No. M1 SIM-only plans are no-contract, so you can cancel in any month with no early-termination fee. The unlimited weekend data perk and intro pricing run for a fixed promotional window, but you are never locked into a minimum term as you would be on a phone bundle.
Yes, through Mobile Number Portability. You request the port during sign-up online or at an M1 shop, and M1 coordinates with your old telco. Activation usually completes within one business day. Check your existing contract first, as porting out early can incur a termination charge from your current provider.
This is general financial information for Singapore, not personal financial advice. Figures change — verify current rates against the official sources above before acting. See our full disclaimer.