20 Most Asked Questions & Answers About SIM-Only Plans Singapore 2026

Quick Summary: SIM-only plans in Singapore give you mobile data, calls, and SMS without a bundled phone. They start from as low as $8/month, cover 4G and 5G, include eSIM options, and come without long-term contracts. This guide answers the 20 most common questions Singaporeans ask before switching.

Introduction:

Imagine scrolling through TikTok at an Orchard hawker centre and having your data cut out mid-video. Traditional handset plans used to lock you into 24-month contracts averaging over S$50 monthly, even as the mobile data market continues to grow at a 5.5% CAGR through 2029. 

Fast forward to 2026 and SIM-only plans have taken over the market. SingStat now reports a 165% mobile penetration rate with nearly 10 million total subscriptions. DataReportal further highlights that there are now 9.79 million connections, representing 166% of the population, largely driven by 5G networks delivering 376 Mbps average speeds.

Looking for the best value? Explore our expert-reviewed answers to the 20 most frequently asked questions about mobile plans in Singapore to help you make an informed choice.

1. What is a SIM-only plan?

A SIM-only plan is a mobile subscription that provides calls, SMS, and mobile data without a bundled handset. You keep your existing phone and pay a monthly fee purely for connectivity.

Because there is no handset subsidy built into the price, SIM-only plans are consistently cheaper than traditional bundled mobile plans month to month. In Singapore's highly competitive market, plans with hundreds of gigabytes of data are now available for under $15/month, something unthinkable on a legacy contract plan.

SIM-only plans come in two physical forms:

• Physical SIM card: delivered by courier or collected at a retail outlet or post office

• eSIM (embedded SIM): activated digitally via a QR code within minutes, no hardware required

Bottom line: If you already own a phone and want to reduce your monthly bill, a SIM-only plan almost always offers better value than a bundled contract.

2. Which is the best SIM-only plan in Singapore?

The best SIM-only plan in Singapore in 2026 depends on three factors: how much data you use, whether you travel regionally, and whether you want 5G access.

For most Singaporeans, the sweet spot sits at plans offering 300GB–500GB of data with unlimited calls, 5G access, regional roaming coverage, and no contract lock-in.

Circles.Life's SIM-only plans are consistently ranked among the best for value in Singapore. Key reasons:

• Plans start from $8/month, scaling up to 2TB of data

• All 5G plans include access to CirclesAI, a built-in AI marketplace giving subscribers access to ChatGPT, Google Gemini, Perplexity Sonar, and other leading AI models in one app

• No contracts start, change, or cancel at any time with no penalty

• Operates on M1's network infrastructure with 99% island-wide 4G+ coverage

• eSIM activation in under 10 minutes

For a detailed breakdown of how Circles.Life's 5G plans compare with other providers; see our 5G SIM-only plan comparison guide.

3. Which is the cheapest SIM-only plan in Singapore?

As of April 2026, Circles.Life offers some of the most competitive entry-level pricing in Singapore:

For context, a comparable Singtel plan with 60GB costs $35/month. The data-per-dollar gap between MVNOs like Circles.Life and the major telcos are significant in 2026.

Cheapest plans are ideal for:

• Light users who rely mostly on Wi-Fi at home and work

• Students on a tight budget

• Secondary devices, like a travel SIM or backup line

Note: Promotional pricing typically applies for the first 2–3 months. Always check the standard rate before committing.

4. Which is the best 5G SIM-only plan in Singapore?

Singapore has near-nationwide 5G Standalone (SA) coverage in 2026, meaning true low-latency 5G is accessible across most of the island on compatible devices.

Circles.Life offers multiple 5G SIM-only plans at different price points:

All Circles.Life 5G plans include:

• Unlimited local calls

• Access to CirclesAI (ChatGPT, Gemini, Perplexity Sonar, DeepSeek, Qwen, and more)

• eSIM support

• No contract

Who should choose a 5G plan? 

Anyone who streams video regularly, works from cafes or co-working spaces, or wants AI tools bundled with their mobile plan. If your device supports 5G and you are within a 5G coverage zone, the speed and latency improvement over 4G is noticeable.

To check if your device supports 5G, dial *#06# and look for the 5G band information in your device's spec sheet.

5. What are the best postpaid SIM-only plans?

All Circles.Life plans are postpaid; billed monthly with no upfront deposits and no contracts. This is different from prepaid, where you top up credit in advance.

Postpaid SIM-only plans are best for:

• Users who want a fixed, predictable monthly bill

• Those who want higher data allowances automatically renewed each cycle

• Subscribers who need a consistent number for business or personal use

Circles.Life's postpaid structure includes automatic billing at the end of each month. You can manage your plan, buy add-ons, and monitor usage in real time through the Circles.Life app, no store visits required.

For a full comparison of postpaid versus prepaid SIM-only options in Singapore, see our Postpaid vs Prepaid SIM-only guide.

6. What is a data-only SIM plan and who should use it?

A data-only SIM plan provides mobile data without calls or SMS. These are ideal for:

• Tablets and iPads: for Netflix, YouTube, or remote work on the go

• Mobile Wi-Fi routers (MiFi/hotspots): to share data with multiple devices

• Secondary phones: if you use internet-based calling apps (WhatsApp, Telegram, Zoom) exclusively

• IoT and smart devices: cameras, GPS trackers, and similar equipment

Circles.Life's data-only plans (as of March 2026):

All data-only plans carry a one-time $0.30 activation fee. They can be set up as eSIMs for instant digital activation.

7. Are SIM-only plans better than prepaid plans?

For most Singaporeans who use their phones regularly, yes, SIM-only postpaid plans offer better value than prepaid credit top-ups.

Here is how they compare:

Prepaid plans still make sense for short-term visitors to Singapore or for users who want strict spending control with no risk of bill overage. For daily commuters, students, and working adults, a postpaid SIM-only plan provides significantly more data per dollar.

For a deeper comparison, read our SIM-only vs Contract plan guide for 2026.

8. What are the key benefits of a SIM-only plan?

SIM-only plans offer six distinct advantages over traditional bundled mobile plans in Singapore:

1. Lower monthly cost: Without a handset subsidy baked into the price, monthly fees are substantially lower. Plans with 300GB+ of data are available from $10–18/month.

2. No device lock-in: You use any unlocked phone, whether it is an iPhone 16, Samsung Galaxy S25, or a two-year-old device you own outright.

3. No long-term contracts: Circles.Life and most MVNOs in Singapore offer genuinely contract-free plans. You can switch, pause, or cancel at any month-end with no early termination fees.

4. eSIM compatibility: The majority of 5G SIM-only plans in Singapore support eSIM activation, allowing instant digital setup without waiting for a physical SIM card.

5. AI and lifestyle perks: Circles.Life 5G plans include CirclesAI bundling access to ChatGPT, Google Gemini, Perplexity Sonar, Claude, DeepSeek, and Qwen at no extra cost beyond the plan fee ($0.70 platform fee applies from January 2026).

6. Easier telco switching: Mobile number portability in Singapore is free and typically completes within a few hours, making it straightforward to move between providers as better deals emerge.

9. Do SIM-only plans have contracts?

Most SIM-only plans in Singapore, particularly those from MVNOs like Circles.Life are contract-free. You pay month by month with no minimum commitment period and no early termination charges.

Some traditional telcos (Singtel, StarHub, M1) still offer optional 12-month SIM-only contracts that may come with slightly discounted rates or device upgrade subsidies, but these come with lock-in periods.

Circles.Life's position: all plans are no-contract by default. To cancel, submit a request via the app or call customer service at +65 8808 6868 (Monday to Sunday, 9 am–6 pm) before 12 pm on the last day of the billing month.

10. Can I switch telcos easily with a SIM-only plan?

Yes. Switching telcos in Singapore is one of the simplest in Asia. The process:

1. Sign up for your new plan online (takes less than 10 minutes with eSIM)

2. During sign-up, select "port my number" and provide your current number and account details.

3. Number porting is free and typically completes within a few hours

4. Your service with the old telco ends automatically

Because there is no handset contract involved, there is nothing to buy out or transfer. This is one of the most practical advantages of SIM-only plans: you are never trapped by device financing.

Circles.Life has received strong community ratings on platforms like Seedly (4.2 stars) specifically for its easy porting process and transparent digital account management.

11. Do SIM-only plans support international roaming and IDD?

Yes. Most SIM-only plans in Singapore include some form of international roaming capability, though the specifics vary significantly by plan.

Circles.Life roaming options as of April 2026:

For IDD calls, Circles.Life offers pay-as-you-go international calling rates. All roaming add-ons are activated directly through the Circles.Life app, no store visit needed.

See our full data roaming comparison guide for a side-by-side comparison with Singtel, StarHub, GOMO, and SIMBA.

12. Can I use my SIM-only plan abroad?

Yes, with the right setup. Here is how:

Option 1: Activate a roaming add-on before departure 

Through the Circles.Life app, activate a GoRoam or SuperRoam pack before your flight. Your local Singapore number stays active, and you get a data allowance in your destination country.

Option 2: Switch to the Circles Pro plan for seamless roaming 

The Circles Pro plan provides a massive 600GB of local 5G data and includes a dedicated 100GB allowance for Malaysia roaming. For those travelling further, it also comes with 12GB of Asia roaming and 1GB of Global roaming, making it a powerful all-in-one option for regional travellers and power users alike.

Option 3: Use a travel eSIM 

For trips outside the covered regions, adding a destination-specific eSIM from Circles.Life or a third-party provider alongside your Singapore plan keeps costs predictable.

Pro tip: Activate roaming before boarding your flight. Trying to activate roaming after landing can take longer and may leave you relying on airport Wi-Fi.

13. Can I get 5G coverage with a SIM-only plan?

Yes. Singapore has near-nationwide 5G Standalone (SA) coverage in 2026. To access 5G on a SIM-only plan, you need three things:

1. A 5G-capable device, most smartphones released from 2021 onwards support 5G

2. A plan that includes 5G access for all Circles.Life 5G plans qualify

3. Being within a 5G coverage area  in Singapore, this covers the vast majority of the island

To check if your device supports eSIM (often bundled with 5G plans), dial *#06# on your phone. If an EID number appears, your device is eSIM-compatible. Also, confirm your phone is unlocked from any previous carrier.

Circles.Life operates on M1's network, which carries both 4G and 5G coverage across Singapore with 99% island-wide 4G+ availability.

14. What if I run out of data on my SIM-only plan?

If you exhaust your monthly data allowance before the billing cycle renews, you have three options:

1. Purchase a data add-on via the app: Circles.Life's app allows you to buy additional data in real time. Add-ons are activated instantly.

2. Upgrade to a higher data plan: If you consistently exceed your data cap, upgrading to the next tier is straightforward and takes effect at the next billing cycle.

3. Speed throttling (depending on plan): Some plans continue data access at reduced speeds (typically 1Mbps) once the monthly allowance is exhausted. Check your specific plan's Fair Use Policy in the Circles.Life app for the exact behaviour.

Usage tip: The Circles.Life app shows real-time data consumption. You can set alerts before hitting your limit to avoid unexpected throttling or add-on charges.

15. Can I keep my number with a SIM-only plan?

Yes. Mobile Number Portability (MNP) is available in Singapore and is free to use. Your existing mobile number is yours to keep regardless of which telco it was originally registered with.

How number porting works with Circles.Life:

1. During sign-up on the Circles.Life website or app, select "I want to port my existing number."

2. Enter your current mobile number and the account number from your existing telco.

3. The port request is submitted automatically during the sign-up process

4. Most transfers are complete within a few hours; some may take up to one business day

There is no need to contact your old telco to initiate the port  Circles.Life handles this on your behalf.

16. Is a SIM-only plan worth it?

For the vast majority of Singaporeans in 2026, yes, a SIM-only plan is the better financial choice if you already own a working smartphone.

Consider the numbers: Circles.Life's 350GB 4G plan costs $10.80/month. A comparable bundled Singtel plan with 60GB costs $35/month and locks you into a 12-month contract. Over 12 months, that is a difference of over $290, enough to buy a mid-range phone outright.

A SIM-only plan is worth it if:

• You own a phone in good working condition

• You want to reduce monthly mobile expenses without sacrificing data

• You travel to Malaysia, Indonesia, or other ASEAN countries and want regional roaming built in

• You want AI tools (ChatGPT, Gemini, Perplexity) bundled into your mobile subscription

• You value the ability to switch plans or providers at any time

A bundled contract plan may still make sense if:

• You need a new flagship phone and want to spread the device cost monthly

• Your employer covers mobile plan costs under a CIS (Corporate Individual Scheme) arrangement

For corporate employees, explore whether your company qualifies for Circles.Life CIS plans, which offer up to 25% additional savings.

17. What are the top telcos offering SIM-only plans in Singapore?

Singapore's mobile market in 2026 has two tiers: the three major network operators (MNOs) and a growing field of MVNOs and digital telcos that resell network capacity at more competitive prices.

Major Network Operators (MNOs)

• Singtel: largest coverage footprint, premium pricing, bundled device options

• StarHub: strong entertainment bundles, competitive mid-range pricing

• M1: solid 4G and 5G network, competitive corporate plans

MVNOs and Digital-First Telcos

• Circles.Life: Asia's first fully digital telco (launched June 2016), running on M1's network. Offers 4G, 5G, eSIM, data-only, Roaming, and CirclesAI. No contracts. Plans from $8/month.

• GOMO (Singtel sub-brand) offers no-frills, affordable data plans

• Giga! (StarHub sub-brand)  budget 5G plans from $10.19/month

• MyRepublic has strong data allowances, no contracts

• SIMBA and Zero1  additional budget MVNO options

Community platforms like HardwareZone and Seedly regularly track current plan pricing across all providers. For a live comparison, visit circles.life/sg/plans or independent comparison tools like SimFinder.

18. Can I switch to a SIM-only plan if I'm in a contract?

Yes, but the process depends on your current contract terms.

If you are on a contract bundled with a device subsidy:

• You may need to pay an Early Termination Fee (ETF) to exit before the contract end date

• The ETF is typically calculated based on the remaining months of your contract

• Check your contract terms or call your current telco to confirm the exact amount

If your contract has expired or you are already month-to-month:

• You can port your number to a SIM-only plan at any time with no penalty

Practical approach: If the ETF is small relative to your monthly savings, it may still make financial sense to switch early. Calculate the break-even point: (monthly savings on new plan) × (months remaining) versus (ETF amount).

19. What are the disadvantages of SIM-only plans?

SIM-only plans are not universally the right choice. Here are the genuine trade-offs to consider:

No device subsidy: If you need a new phone, you pay the full retail price upfront or in installments through a separate financing arrangement. Bundled plans spread the device cost across 12–24 months.

Device financing is separate: Unlike contract plans, where the device and plan are one bill, SIM-only users manage device purchases independently. This requires more upfront capital or a separate installment plan.

Entry-level plans may have trade-offs: The cheapest plans (under $12/month) are typically 4G-only and may have lower roaming allowances or no CirclesAI access. 5G and AI features sit in the mid-tier plans ($18+/month).

PayG roaming costs if travelling outside covered regions: If you activate roaming in a country not covered by your plan's built-in allowance and do not purchase an add-on, Pay-As-You-Go rates apply and can add up quickly. Always activate a roaming pack before travelling.

20. What are the types of SIM-only plans available in Singapore?

Singapore's SIM-only market offers six distinct plan categories in 2026:

1. Standard 4G SIM-only plans: No-contract monthly plans with 4G speeds and large data allowances. Starting from $8–12/month. Ideal for budget-conscious users who do not need 5G.

2. 5G SIM-only plans: Access to Singapore's 5G Standalone network. Circles.Life 5G plans include CirclesAI, unlimited calls, and regional roaming. Starting from $18/month.

3. Roaming/ Regional Roaming plans: Data allowance shared across Singapore and multiple ASEAN countries.

Circles.Life Roaming plans provide up to 800GB Malaysia + 50GB Global across 15 countries. Best for frequent travellers to Malaysia, Indonesia, Thailand, Korea, Japan, Australia and beyond.

4. eSIM plans: Digitally activated plans using embedded SIM technology. Available across all 4G and 5G tiers. Activate in under 10 minutes via QR code. Compatible with most iPhones (XS and newer) and Android devices from major manufacturers.

5. Data-only SIM plans: No calls or SMS, pure data. Available in 4G (210GB at $8/month, 500GB at $12/month) and 5G (1TB at $20/month) variants. For tablets, hotspots, and secondary devices.

6. Senior and CIS plans: Circles.Life offers dedicated plans for customers aged 60 and above (Seniors Core and Seniors Plus) and for employees of partner businesses under the Corporate Individual Scheme (CIS). Seniors' plans include access to CirclesAI.

Final Thoughts: Choosing the Right SIM-only Plan in Singapore

Singapore's mobile market is one of the most competitive in the Asia-Pacific region. Budget MVNOs now offer 350GB of 4G data for under $11/month, while 5G plans with AI access and regional roaming are available for $18/month with no contracts.

Quick decision guide:

Before switching, verify your device supports eSIM (dial *#06# and look for an EID number) and confirm it is not carrier-locked. The porting process itself takes only a few hours.

Explore all current Circles.Life plans →

Frequently Asked Questions 

What is the cheapest 5G SIM-only plan in Singapore? 

As of April 2026, Circles.Life's Circles Plus 5G plan is available from $12.88/month for the first month (promotional rate), reverting to $18/month after. It includes 300GB of local data, 8GB Asia roaming, unlimited calls, and CirclesAI access.

Is Circles.Life a reliable telco in Singapore?

Circles.Life operates on M1's network infrastructure, which has 99% island-wide 4G+ coverage, including MRT stations and underground areas. The company was launched in June 2016 as Asia's first fully digital telco and holds a 4.2-star rating on Seedly based on over 1,500 user reviews.

Can tourists buy a SIM-only plan in Singapore? 

Yes. Tourists with a valid passport can sign up for Circles.Life plan online or at any of our over 88 retail partner outlets. eSIM activation is available for instant digital setup without visiting a store.

What is CirclesAI? 

CirclesAI is an AI marketplace built into the Circles.Life app that is bundled with all 5G plans. It provides access to multiple AI models, including GPT-5.4, Google Gemini, Perplexity Sonar, Claude, DeepSeek, and Qwen, all from a single subscription. A $0.70 platform fee applies from January 2026.

How do I activate an eSIM in Singapore? 

To activate a Circles.Life eSIM: (1) select an eSIM-eligible plan on the website, (2) complete identity verification online, (3) receive a QR code by email, (4) scan the QR code in your phone's Settings under Mobile Data or Cellular. Activation typically takes under 10 minutes. Your device must support eSIM (check by dialling *#06# for an EID number) and be unlocked from other carriers.

Which Circles.Life plan is best for travel to Malaysia? 

The Circles Pro plan ($14.88/month) includes 100GB of Malaysia roaming data alongside 13GB Global roaming, including Australia, Japan, Korea and more. For heavy Malaysian travellers, the Circles Ultra ($32/month) includes 800GB of Malaysia roaming data.