Quick answer: Singtel, StarHub and M1 are the big-three prepaid picks if you want a physical store and the widest 5G coverage. For a fully digital setup, Giga (StarHub’s network) and Circles.Life let you tweak everything from an app. SIMBA and Zero1 stretch your dollar further with heavy data caps and unlimited-after-quota options — great for heavy streamers and budget-conscious users.
When the day ahead matters—whether you’re landing for a wedding, closing a deal, or hosting visitors—a reliable prepaid SIM is your silent partner. You’re not just picking a plan; you’re ensuring your map loads, your call connects, and your photos upload without a hiccup. This list helps you match a SIM to the moment you’re planning, so nothing stalls the day you’ve been building towards.
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Singtel
Singtel is the name most people think of first, and their network backs up the reputation. The hi! prepaid SIM cards come with up to 120GB of 5G data, plus unlimited local calls and SMS. Free roaming in selected countries is thrown in — shiok if you pop over to Johor regularly. Social media and streaming add-ons keep your TikTok scrolling smooth without eating into the main data pot. They’ve also been recognised as Singapore’s fastest 5G network provider, so if speed is non-negotiable, this is the one.
Who it suits: anyone who wants the most reliable blanket of coverage and doesn’t mind paying a little more for the peace of mind. Physical stores all over the island mean you can walk in, grab a SIM, and be online before your kopi turns cold.
If your important day involves a dash to Johor for supplies or a meet-up with relatives crossing over, this SIM’s free roaming keeps you connected without break. The wide 5G coverage means your video calls hold steady in busy venues. Activate it online a day ahead so you’re not fumbling with settings when the moment arrives.
Address: 31 Exeter Road, Comcentre, Singapore 239732 (more branches here)
Phone: 1688
Hours: varies by location, typically 10am–8pm daily
Singtel prepaid plans
StarHub
StarHub’s Happy Prepaid SIM is built for people who travel often and manage everything from their phone. Plans offer up to 120GB local data and roaming across 17 destinations. Unlimited incoming calls and a stash of IDD minutes are bundled in, and the StarHub app makes topping up feel like tapping your EZ-link card. They’ve bagged awards for customer satisfaction in mobile connectivity, which tells you the whole experience is fuss-free.
If you’re here on a short trip, our guide on Tourist SIM Cards in Singapore for Effortless Connectivity might be exactly what you need.
Who it suits: the frequent flyer who hates hunting for a local SIM in every new country. You buy one, activate it, and roam without drama.
If your milestone involves welcoming overseas guests and you need to stay reachable across time zones, StarHub’s app gives you control. Top up from anywhere and activate roaming packs before your visitors land. The unlimited incoming calls mean no missed check-ins from the airport—your coordination stays seamless on a day packed with back-to-back moments.
Address: 67 Ubi Avenue 1, #05-01 StarHub Green, Singapore 408942 (more branches here)
Phone: 1633
Hours: varies by location, generally 11am–9pm daily
StarHub prepaid plans
M1
M1 keeps it straightforward with the M Card prepaid. You get up to 100GB of data, unlimited calls in selected bundles, and 5G access that works without a slew of hoops to jump through. International roaming add-ons are there if you need them, and activation is quick — whether you’re a local or just landed. No frills, but that’s exactly why many stick with it.
Who it suits: someone who wants a steady, reliable connection at a fair price and prefers walking into a store for help now and then.
If your day has no room for uncertainty, M1’s straightforward setup is a comfort. You can pick up a SIM and have it working before you step away—ideal when you’re coordinating a dinner or fetching important guests. Reliable 5G keeps your navigation and payment apps humming through every tight schedule.
Address: 10 International Business Park, Singapore 609928 (more branches here)
Phone: 1627
Hours: varies by location, typically 11am–9pm daily
M1 prepaid plans
This list is editorial, not advertising. Run something similar? Tell us what you do and we will take a look.
Giga
Giga, powered by StarHub, lives entirely on your phone — no physical store, no queue, just an app you download. Grab an eSIM or a physical SIM delivered to you and you’re set. Plans are flexible, with rollover data up to a whopping 300GB and unlimited calls on some options. Roaming packs and social-media bundles that don’t touch your main data make it feel tailored. They were named Best Digital Telco Mobile Service Provider, and the rollover data alone makes heavy users smile.
Who it suits: the app-savvy Singaporean who hates dealing with counters and loves the idea of data that rolls over instead of vanishing at month-end.
If you’re the sort who manages the entire day from your phone—from RSVPs to last-minute floor plans—Giga’s app-only experience keeps things tidy. Opt for an eSIM and activate it during your rehearsal; no card to lose. With data that rolls over, you can upload the entire wedding gallery without worrying about running out halfway.
Address: online-only service
Phone: +65 8512 5203
Support: 24/7 via app and chat
Email: [email protected]
Giga
Still browsing broadly? Our Sim Cards in Singapore guide compares every type, from postpaid to tourist plans.
Circles.Life
Circles.Life puts customisation front and centre. Unlimited data options, bonus roaming, and video-streaming add-ons mean you only pay for what actually matters to you. Their app makes it dead easy to tweak your plan, and loyalty rewards like free data boosts show up without you asking. Everything is online and support runs 24/7 through the app.
Who it suits: the kiasu personaliser who wants their SIM plan to fit like a tailored shirt — and wouldn’t mind getting a few free data treats along the way.
When you know exactly what you’ll need—maybe extra data for a live stream or IDD minutes to call grandparents abroad—Circles.Life lets you tune the plan like you’re sound-checking a playlist. The app’s loyalty bonuses mean you might wake up on your special day with a free data boost, just when streaming the ceremony matters most.
Address: online-only service
Email: [email protected]
Support: 24/7 via app
Circles.Life
SIMBA
SIMBA (formerly TPG) barged into the market with 5G at a price that doesn’t make you wince. Their plans climb to 130GB of 5G data and include roaming in over 50 countries — you read that right. Free incoming calls and a low entry price make it a go‑to for people who burn through data like nobody’s business. It’s online-only, with support on weekdays.
Who it suits: the heavy streamer who wants maximum gigabytes for minimum dollars, and values 5G speeds everywhere they go.
If your big day involves a lot of moving around—from void-deck solemnisation to reception at a rented venue—SIMBA’s generous 130GB plan allows you to hotspot for your helper team without worrying about the gauge. Roaming in over 50 countries is handy if you’re honeymooning right after; no need to swap SIMs when you board the plane.
Address: online-only service
Phone: +65 6995 1010
Email: [email protected]
Support hours: 9am–6pm, Monday to Friday
SIMBA
Zero1
Zero1 is the one for people who never want to see “data exhausted” on their screen. After a base quota, unlimited local data kicks in under a fair-usage policy — so your connection stays alive even if it’s not flying at 5G speed. IDD calls and roaming options are also on the table. They have a physical office in D’Lithium, and support runs on weekday office hours.
Who it suits: the always-on user who wants peace of mind that their data won’t just cut off mid-journey.
Directing vendors via WhatsApp all morning? A dead screen is unthinkable, but Zero1’s unlimited data under fair use ensures your connection never cuts out at a crucial moment—like when the cake topples. Collect your SIM from their office a day early, and sleep soundly knowing your phone will keep buzzing with the updates that matter.
Address: 82 Playfair Road, #12-01 D’Lithium, Singapore 368000
Phone: +65 6970 0100
Email: [email protected]
Hours: 9am–6pm, Monday to Friday
Zero1
If you’re hunting for a more atas mobile experience, we’ve also rounded up Elite Mobile SIM Cards in Singapore that cater to travellers who expect a little more polish.
This list is editorial, not advertising. Run something similar? Tell us what you do and we will take a look.
How to choose
Start with how you actually use your phone. If you stream HD video on your commute and hotspot your tablet, a fat data cap like SIMBA’s 130GB or Giga’s rollover 300GB will save you constant top-ups. If you’re overseas every other month for work, StarHub’s 17-destination roaming and Circles.Life’s bonus roaming are built for you.
Then decide whether you want a store to walk into. Singtel, StarHub and M1 have outlets all over the island where a human can sort you out. Giga, Circles.Life and SIMBA are digital-only — sign-up takes minutes on the app, but support is via chat or email.
Prices range from around $10 for basic starter packs to $30 or more for heavy-data, roaming-loaded plans. Zero1 and SIMBA often sit at the lower end. Don’t forget to check fair-usage policies if you’re eyeing an unlimited plan — some throttle after a cap, others keep you going at manageable speeds.
| Provider | Network | Max data (approx.) | Roaming | Digital-only? | Standout feature |
|---|---|---|---|---|---|
| Singtel | Singtel | 120GB (5G) | Selected countries | No | Fastest 5G network |
| StarHub | StarHub | 120GB | 17 destinations | No | Travel-friendly app and multi-country roaming |
| M1 | M1 | 100GB (5G) | Available as add-on | No | Straightforward 5G with easy activation |
| Giga | StarHub | Up to 300GB (rollover) | Roaming packs available | Yes | Rollover data and social-media bundles |
| Circles.Life | M1 | Unlimited data options | Bonus roaming | Yes | Customisable plans and loyalty rewards |
| SIMBA | SIMBA | 130GB (5G) | Over 50 countries | Yes | Budget 5G with wide roaming |
| Zero1 | Singtel | Unlimited after base quota | Available | No (office address) | Unlimited data under fair-usage policy |
Summary
Singapore’s prepaid SIM market gives you everything from rock-solid 5G on the major networks to fully digital plans you can spin up in minutes. Whether you need travel roaming, a mountain of data, or just a simple line that works, there’s a card here that fits the way you live. Pick the one that matches your habits and you’ll wonder why you ever locked into a contract.
Disclaimer: Details can change. Always confirm plans and prices directly with the provider before you buy.
Frequently asked questions
Do I need to register my prepaid SIM card in Singapore?
Yes. You’ll need to provide your NRIC, FIN or passport when you buy a prepaid SIM. The telco registers it to your identity.
Can I use a prepaid SIM for international roaming?
Many plans include or let you add roaming. StarHub covers 17 destinations, SIMBA lists over 50 countries, and others offer roaming packs. Check the specific plan before you travel.
What happens when my prepaid data runs out?
You can top up via the provider’s app, website, or at retail outlets. Some plans like Zero1 switch you to unlimited data at reduced speeds, while others stop data entirely until you add more.
Are there prepaid plans that work on 5G?
Yes. Singtel, M1, SIMBA and others offer 5G on their prepaid packs. Look for “5G” in the plan description—coverage may vary by location.
Can I keep my phone number if I switch to a prepaid SIM?
If you are moving from a postpaid to a prepaid plan on the same network, you can often port your number. Transferring between different providers is possible but may involve a new SIM. Ask the telco first.
Are digital-only providers like Giga and Circles.Life reliable?
They run on major networks (Giga uses StarHub, Circles.Life uses M1), so coverage is similar. Support is handled through apps and chat rather than in person, which works well if you’re comfortable with that.
