Quick answer: The best data SIM plans in Singapore come from digital-first telcos that skip physical stores and contracts. Circles.Life and Giga! give you a terabyte of 5G data with rollover and roaming perks. GOMO and MyRepublic offer large 5G bundles and award-winning reliability. SIMBA, Maxx, and CMLink shine for frequent travellers to Asia, each with its own low-cost roaming edge. All seven run month-to-month, app-managed, and easy to cancel anytime.
You’re not here for the biggest number. You want a Data Sim Card that surprises you – maybe free roaming to somewhere unexpected, or an app that doesn’t feel like homework. Instead of counting gigabytes, you can agak agak your way to a plan that just works. We dug in, and a few genuinely caught us off guard.
Want to compare across the whole category? That is what Best Phones & Computers in Singapore is for — 64 guides in total.
Circles.Life
Circles.Life has been the go-to for anyone who wants to build their own plan without getting locked in. They are an online-only telco running on a major network, and everything – sign-up, billing, add-ons – happens in their app.
The star plan is the 5G 1TB option with unlimited talktime and free roaming to select destinations. If that sounds like overkill, the 388GB 4G Lite plan still gives you more data than most people can finish in a month. One quiet perk: any leftover data rolls over, so you do not lose what you paid for. You can also stack add-ons for extra roaming or IDD minutes whenever you fly.
This one suits the control freak in the best way – you only pay for what you actually use, and you can tweak your plan each month. It also helps that their 24/7 in-app support is surprisingly responsive for a digital telco.
Circles.Life
10 International Business Park, Singapore 609928
Support via app or chat anytime
Plans from about $20/month
This one is for the phone-tinkerer who wants to zhng their plan until it fits just right. Everything lives in a slick app, and you can stack roaming and add-ons like building a playlist. It feels less like a telco and more like a side quest – perfect for anyone who enjoys a bit of control.
GOMO
GOMO is Singtel’s digital-only brand, so you get the same network reliability without the contract or the Singtel price tag. They keep things dead simple: a few big-data plans, no frills, and a clean app.
The big seller is the 5G+ Pro plan with 500GB data and roaming that covers Malaysia, Indonesia, Thailand, and a handful more. The 300GB 4G Plus plan is the more down-to-earth pick and still comes with unlimited Malaysia roaming – a huge plus if you head north even once a month. Everything is prepaid and month-to-month, so there is no bill shock.
If you want strong coverage and you trust the Singtel backbone, GOMO is a natural choice. The data bundles are generous enough that you can hotspot your whole family during a weekend at East Coast Park and still not worry.
Editorial round-up, not a directory listing. Missed someone worth knowing about? Send it our way.
GOMO
31 Exeter Road, Comcentre, Singapore 239732
24/7 support via app chat
Plans from about $18/month
GOMO is the no-brainer pick if you just want everything swee – good network, simple sign-up, no fine print. The app is clean and never sends you push notifications about things you don’t care about. It’s the definition of set-it-and-forget-it, which honestly feels kind of luxurious.
Giga
Giga! runs on StarHub’s network and has a bit of personality, which is rare in telco land. Their app feels more like a lifestyle dashboard, and they are not shy about rolling out free roaming packs and unlimited add-ons.
The headline act is the 1TB 5G plan with rollover data and Asia roaming. Even the lighter 400GB 5G plan is still more than what most heavy streamers need. The free international roaming included in many plans is the real draw – useful if you are constantly bouncing around the region for work or family. App-based setup takes minutes, and you can port your old number over.
Giga! suits anyone who wants maximum data and a bit of fun in the interface, without paying premium rates. Students, creatives, and people who live on their phones will feel at home here.
For a different kind of upgrade, you might also enjoy our Singapore’s Premier Veneer Specialists or a quiet afternoon at one of Orchard’s Café Escapes.
Giga!
67 Ubi Avenue 1, StarHub Green, Singapore 408942 (more branches available)
24/7 support via WhatsApp or app
Plans from about $20/month
If a telco had a personality, this one would actually have a sense of humour. The app feels designed by people who use phones in real life, and the surprise free roaming packs that pop up make you go, wah, didn’t expect that. It’s the pick for when you want a plan that keeps things light.
MyRepublic
MyRepublic might be better known for broadband, but their mobile plans have been quietly collecting awards. HardwareZone readers voted them the #1 MVNO Service Provider in Singapore five years running, which says plenty about the real-world experience.
Their 800GB 5G plan comes with unlimited local calls and roaming options that you can tailor. The 288GB 4G plan is the budget-friendly one and still covers most people’s needs. A detail gamers will appreciate: they tuned the network for low latency, so your connection stays smooth even when the whole house is streaming.
There is a physical store at Sembawang Shopping Centre if you prefer to talk to a human, and operating hours are Monday to Friday, 12pm to 8.30pm (varies by location). For a telco that regularly tops user polls, the contract-free setup feels reassuring rather than risky.
MyRepublic
11 Lorong 3 Toa Payoh, Block B #04-11/15 Jackson Square, Singapore 319579
Phone: +65 6717 1680
Plans from about $18/month
Recommend it to your family, then quietly switch to it yourself. It’s reliable without being boring, and the ability to tailor roaming to specific trips means you’re not paying for countries you’ll never visit. The app is straightforward, and the support actually responds.
SIMBA
SIMBA is a full-fledged mobile operator with its own 5G network, not just an MVNO piggybacking on someone else’s tower. Their plans go heavy on international roaming at prices that can make you do a double take.
The 500GB 5G SIM-only plan throws in free roaming to Myanmar and IDD minutes to select countries, plus unlimited calls to local mobile numbers. If you often need to dial overseas or travel to destinations that other telcos barely cover, SIMBA makes life considerably simpler. eSIM support is a bonus if you prefer not to swap physical cards.
This one is for the practical traveller who would rather spend the roaming savings on a good meal. The seniors hotline runs Monday to Friday, 10am to 6pm, but digital support is available around the clock.
SIMBA
1 Kaki Bukit View #02-10 Techview, Singapore 415941
Phone: +65 6513 0666
Plans from about $12/month
Because it runs its own 5G network, the connectivity can feel steadier in packed MRT carriages and busy hawker centres. The roaming coverage includes destinations that other plans overlook, making it a standout for travellers with less common stops. It’s a full operator that still feels nimble.
Maxx
Maxx keeps things almost aggressively straightforward: pay one low price, get a big chunk of data and calls, and never worry about excess charges. They are an online-only service, and their app does the heavy lifting.
During promotional cycles you can grab a plan at $7.90 with 5G access and APAC roaming included. The regular bundles still deliver plenty of data and international minutes, and porting your number is a breeze. The zero excess charge policy is the real draw – once you hit your limit, data just stops, so you never open a bill and feel your heart drop.
Maxx fits the person who wants a reliable second line for travel or a no-drama primary line that costs less than a Grab ride. It is hard to argue with a plan that costs less than lunch and still gives you 5G.
Editorial round-up, not a directory listing. Missed someone worth knowing about? Send it our way.
Maxx
Online-only service
24/7 support via app
Plans from $7.90 (promotional)
Maxx keeps things chop chop – sign up online, and you’re done in minutes. There’s no contract, no excess charges, and the app handles everything without a single call centre script. It’s the plan you grab during a promo and then forget about because it simply works.
CMLink
CMLink bridges Singapore, China, and Hong Kong with data-sharing plans that feel made for families split across borders. They operate as an MVNO with deep ties to China Mobile, so the roaming quality in Greater China is a cut above what most local telcos can offer.
The Unlimited SIM-only plan covers roaming in China and several APAC destinations, while the 400GB option spreads data across multiple countries. International calls can cost what local calls do, which is rare. They also have a physical shop at JEM in Jurong and a 24/7 hotline, so getting help is easy even when you are overseas.
If your work or family life stretches across the region, CMLink removes the usual roaming headache entirely. It also quietly doubles as a way to keep a Chinese number active without maintaining a separate line.
CMLink
50 Jurong Gateway Road, #04-04, JEM, Singapore 608549
Phone: +65 8870 0086 (24/7 hotline)
Plans from about $20/month
If you enjoy digging into this kind of practical guide, you might also like our look at Premier CCTV Providers in Singapore or a calm afternoon refuelling at one of Singapore’s Premier Sashimi Destinations.
How to choose
Start with how much data you honestly use each month. Most of us overestimate – check your current usage in your phone settings. A 1TB plan is shiok but wasted if you barely cross 30GB. Then look at where you travel. If JB day trips are your thing, GOMO’s unlimited Malaysia roaming is a money-saver. If you fly to China or Hong Kong often, CMLink makes much more sense than SIMBA’s broader but shallower roaming list.
All these providers run on contract-free, month-to-month plans, so switching is painless. Prices range from as low as $7.90 on promotion to around $30+ for the heaviest plans. The sweet spot for most regular users sits between $18 and $25, where you get 300GB to 500GB with solid roaming perks.
Check whether the provider has eSIM support if you use two lines. Circles.Life, Giga!, SIMBA, and GOMO all support it. Physical SIMs are still available everywhere but eSIM makes activation instant. Lastly, read the fine print on rollover data – Circles.Life and Giga! let you keep what you do not use, which effectively stretches your dollar further.
| Provider | Best for | Max data | Roaming highlight | Price from | Contract |
|---|---|---|---|---|---|
| Circles.Life | Custom plans, rollover data | 1TB 5G | Free select destinations | ~$20/mth | None |
| GOMO | Singtel network, JB trips | 500GB 5G | Unlimited Malaysia | ~$18/mth | None |
| Giga! | Huge data, fun app | 1TB 5G | Free Asia roaming packs | ~$20/mth | None |
| MyRepublic | Award-winning reliability | 800GB 5G | Optional roaming add-ons | ~$18/mth | None |
| SIMBA | Southeast Asia roaming | 500GB 5G | Free roaming to Myanmar | ~$12/mth | None |
| Maxx | Lowest cost, no bill shock | 5G access during promos | APAC roaming | $7.90 (promo) | None |
| CMLink | China, HK data sharing | Unlimited (throttled) | Data sharing CN/HK | ~$20/mth | None |
Summary
Honestly, there is no bad pick in this bunch – each provider solves a different puzzle. Go for GOMO or MyRepublic if you crave network stability and award-winning support. Pick Circles.Life or Giga! when you want to max out your data and keep leftover gigabytes. SIMBA, Maxx, and CMLink earn their keep whenever a passport enters the conversation. All of them let you walk away anytime, so the real question is simply: where do you need your data to work, and how much are you willing to pay for that peace of mind?
Disclaimer: Details can change. Always confirm the latest plans, prices, and roaming coverage directly with the provider before signing up.
Frequently asked questions
Made for anyone who regularly splits time between Singapore, China, or Hong Kong. The data-sharing across borders is seamless, and the roaming quality in Greater China feels particularly reliable. If you have family overseas, this plan feels like it was built for your group chat.
What is the cheapest data SIM plan in Singapore right now?
Maxx often runs promotions as low as $7.90, which includes 5G access and roaming to several APAC destinations. Outside of promos, SIMBA’s plans start around $12 and include useful roaming perks, making it the most affordable everyday option.
Which data SIM is best for JB trips?
GOMO includes unlimited Malaysia roaming on its 5G+ Pro and 4G Plus plans. SIMBA and CMLink also include Malaysia in their roaming bundles, but GOMO’s unlimited allowance is hard to beat if you go over regularly.
Are these plans really contract-free?
Yes, all seven providers listed offer month-to-month, no-contract plans. You can cancel anytime through their respective apps without penalty.
Can I keep my existing phone number when I switch?
Absolutely. Every provider here supports number porting, and the process is handled in-app or online, typically completing within a day or two.
Do I need to visit a store to sign up?
For most, no. Circles.Life, GOMO, Giga!, Maxx, and SIMBA are online-only. MyRepublic and CMLink have physical outlets if you prefer face-to-face assistance, but sign-up can still be done online.
Which plan gives the most data?
Circles.Life and Giga! both offer 1TB 5G plans with rollover data – effectively unlimited for almost any user. If you want a massive allowance without worrying about caps, either of these two will do the job.
