The cheapest safe way to handle roaming on a 2026 Singapore trip is to buy a data pass before you fly, from S$5 on Singtel, S$6 on StarHub or S$2.95 a day on M1. The expensive way is the one your phone does by default the second you forget: pay-per-use data, billed up to S$25 per MB, which is roughly S$25,600 a gigabyte. That gap of three or four zeros is the entire reason this guide exists. Singapore now has four real networks after Simba absorbed M1's business in August 2025, and each runs its own roaming pricing, plus a dozen MVNOs that bundle free regional data into your monthly plan. Below is every current option with prices verified against each telco's own page, the pay-per-use rates that cause bill shock, and the exact trip where a travel eSIM beats sticking with your Singapore number.
There are three ways to get data abroad on a Singapore line, and they sit far apart on price. A prepaid data pass from your telco is the standard move, from a few dollars for a single country. A travel eSIM is a second data line you scan onto a modern phone, often cheaper per gigabyte on long or heavy trips. Pay-per-use is the silent fallback that runs the moment you switch on data roaming without either, and it is the one that writes the holiday horror stories.
The numbers explain the panic. Singtel's published pay-per-use data rate is S$25 per MB across most destinations, which works out to about S$25,600 for one gigabyte. You would never spend that on purpose, but a phone left on auto-update can quietly burn tens of megabytes before you notice. Treat unmanaged roaming the way you treat any opportunity cost: the default that asks nothing of you is the one that costs the most.
Each of the four networks sells roaming differently. Singtel's ReadyRoam is a fixed-data prepaid pass. StarHub's DataTravel sells short three-day passes and longer monthly ones, with an unlimited daily option. M1 went all-in on per-day pricing with its Daily Passport, billed only on the days you actually use data abroad. Simba folds roaming straight into its SIM-only plans, so the cheapest roaming can be a plan you already pay for at home.
The table reflects each telco's published entry pricing as of June 2026. Telcos reshuffle the exact gigabyte-and-price pairings and run promos several times a year, so confirm the live figure in the provider's app before buying. The structure stays stable even when the cents move. If you are still deciding which network to keep at home, that choice feeds the roaming question and is covered in our SIM-only plan comparison.
| Telco / plan | Entry price | Data | Billing model | Coverage |
|---|---|---|---|---|
| Singtel ReadyRoam | From $5 | 1GB / 30 days | Prepaid pass | Up to 157 destinations |
| StarHub DataTravel (Asia-Pacific) | From $6 | 1GB / 3 days | Prepaid pass | Asia-Pacific bundle |
| StarHub DataTravel Unlimited | $30 / day | Unlimited | Daily pass | Asia-Pacific |
| M1 Daily Passport | From $2.95 / day | 3GB per 24h | Pay-per-day | Up to 78 destinations |
| M1 Worldwide Daily Passport | From $0.99 / day | Worldwide | Pay-per-day (Bespoke plans) | Worldwide |
| Simba SuperRoam (in plan) | From $10 / month | 12GB+ regional bundled | Included in SIM-only plan | 15+ APAC destinations |
A fixed-data pass like ReadyRoam is predictable but forfeits anything unused, so over-buying wastes money. StarHub's three-day Asia-Pacific pass is cheap for a quick getaway but expensive if a trip drags on, where a 30-day pass or the S$30-a-day unlimited makes more sense. M1's per-day model only charges on days you use data, which suits stop-start itineraries but adds a S$4.95 service fee in the month you travel. Simba's bundled roaming costs nothing extra but only covers its listed regional countries, so it falls short for long-haul.
Pay-per-use is the rate you fall to with no pass active, and the rate card is brutal. The figures below come from Singtel's published standard pay-per-use roaming document for three of the most-visited destinations. Notice the data line is identical across all three at S$25 per MB. The other telcos sit in the same ballpark, which is why every provider now pushes you to buy a pass first.
Voice calls got pricier in 2026 too. From 19 June 2026, Singtel raised roaming voice calls in most countries from S$4.10 to S$6.30 per minute for both incoming and outgoing calls, on top of a per-call connection fee. A ten-minute call home from Tokyo now costs around S$63 in airtime alone. If you must take calls abroad, route them through Wi-Fi calling or a messaging app over data, never the cellular voice network. StarHub's DataRoamCap and similar guards exist precisely because this rate card can spiral; DataRoamCap cuts off data roaming once charges hit S$100 in a billing cycle.
| Destination | Data (per MB) | Outgoing voice (per min) | Send SMS |
|---|---|---|---|
| Malaysia | $25.00 | $0.35 | $0.31 |
| Japan | $25.00 | $6.30 | $0.80 |
| Thailand | $25.00 | $6.30 | $0.80 |
A telco roaming pass keeps your Singapore number live, so bank OTPs, SMS codes and calls still reach you, and there is nothing new to install. That convenience earns a small premium on short regional trips. It stops being worth it on three kinds of trip: long stays, heavy-data trips, and destinations outside your telco's cheap bundles, where you could be paying a premium tier for a single gigabyte.
A travel eSIM is a second data line you scan onto a modern phone in minutes, running alongside your physical SIM. For Japan in 2026, Airalo data eSIMs start from around US$4 for 1GB over a few days, with longer unlimited plans much cheaper per gigabyte than stacking telco passes. Holafly's unlimited daily eSIMs run roughly US$3.90 a day. The smart-money setup on a longer holiday is a hybrid: keep your Singapore line on with its data roaming switched off so it still receives OTPs, and route all data through the eSIM. If you have never set one up, our eSIM guide walks through the activation, and the same discipline that keeps a household monthly budget honest applies here, pick the plan that fits the actual usage, not the one already switched on by default.
The quiet shift in 2026 is that roaming is no longer a separate purchase for many people. A wave of MVNOs now bakes regional roaming data into the monthly SIM-only price, so frequent JB-and-Bangkok travellers pay nothing extra at the border. Simba's S$10 plan bundles roaming for 15-plus APAC destinations. Circles.Life, GOMO, VIVIFI and CMLink all ship similar regional allowances on their mid-tier plans, and CMLink adds China and Hong Kong data that the big three rarely match cheaply.
The catch is the fine print. MVNO traffic can be deprioritised during peak congestion, so speeds dip when the network is busy. The bundled roaming usually covers only a fixed regional list, leaving long-haul on pay-per-use or a separate pass. For a Malaysia-Thailand-Indonesia regular, a bundled-roaming MVNO plan can be the cheapest roaming on the market because you are not paying twice. Weigh it against the cost of your home line the same way you would weigh any recurring lifestyle cost that creeps up unnoticed.
Most roaming horror stories are not bad luck, they are a setting left switched on. The fix is a 60-second routine before you fly and a couple of checks while away. Roaming is one of the few travel costs you can take close to zero with discipline, unlike flights or hotels, so treat it as a fixed pre-trip checklist alongside travel insurance and a travel credit card.
For a single regional country on light data, a telco pass from S$5 (Singtel) or S$6 (StarHub), or M1's S$2.95-a-day Daily Passport, is cheapest and keeps your Singapore number live. If you travel the region every month, an MVNO plan that bundles roaming for free, such as Simba's S$10 plan, often works out cheaper because you pay nothing extra at the border.
Pay-per-use data runs up to S$25 per MB in most destinations, which is roughly S$25,600 for a single gigabyte. Voice calls on Singtel rose to S$6.30 per minute from 19 June 2026. This is why every telco pushes you to buy a data pass or load a travel eSIM before you travel rather than rely on the pay-per-use fallback.
It depends on the trip. For short regional trips on light data, a telco pass is cheap and keeps your number reachable for OTPs. For long stays, heavy data, or countries outside your telco's cheap bundles, a travel eSIM such as Airalo or Holafly is usually cheaper per gigabyte. Many travellers run both: the Singapore line on for OTPs with its data off, and the eSIM for data.
Simba absorbed M1's telecom business in August 2025, but both brands still sell roaming under their own names in 2026. M1 keeps its Daily Passport and Data Passport products, while Simba bundles regional roaming into its SIM-only plans. The merger gives Simba M1's network infrastructure, so coverage is broadly comparable, but the roaming pricing and structure for each brand remain distinct.
Keep data roaming switched off until your pass or eSIM is confirmed active, disable background app refresh and auto-updates, and turn on any bill-cap feature your telco offers, such as StarHub's DataRoamCap that cuts data roaming at S$100 per billing cycle. Use Wi-Fi calling or messaging apps for calls instead of the cellular voice network.
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.