Comparison of Top 5G SIM-Only Plans in Singapore (2025)

Introduction: Why 5G SIM-Only Plans Matter in 2025

5G is no longer a futuristic concept—it’s now mainstream. In 2025, 5G stands for more than just speed. It represents ultra-low latency, higher bandwidth, and the ability to support everything from HD video streaming to remote work and mobile gaming. As mobile usage becomes central to everyday life in Singapore, more consumers are switching to 5G SIM-only plans to enjoy these benefits without being tied to contracts.

The demand for 5G SIM-only plans in Singapore has risen sharply as telcos upgrade their networks and offer faster, more affordable options. Whether you're looking for the cheapest 5G plan, one with the most perks, or a no-contract option, this guide breaks it all down.

In this guide, you’ll find:

• A comparison of the top 5G SIM-only plans

• Key features like data, speed, and roaming

• Who each plan is best for

• How to activate 5G in Singapore

• Final recommendations

What to Look For in a 5G SIM-Only Plan

Choosing the right 5G plan involves more than just picking the one with the highest speed or lowest price. Here are some of the most important features to consider:

• Data Allowance: How much high-speed 5G data is included each month?

• Speed Cap: Does the plan throttle speeds after a limit?

• Roaming Perks: Are there included GBs for regional travel (e.g., Malaysia, Indonesia)?

• Plan Type: Is it contract-free?

• Coverage: Does the telco offer widespread 5G support across Singapore?

• Extra Benefits: Are there lifestyle perks like streaming, vouchers, or loyalty rewards?

Top 5G SIM-Only Plans in Singapore (2025)

Let’s explore the top telcos offering 5G SIM-only plans in Singapore this year.

1. Circles.Life 5G SIM-Only Plans

Circles.Life remains a favourite for contract-free flexibility and large data bundles. Its 400GB 5G plan (which reverts to 250GB after 3 months) is perfect for heavy users.

Key features:

• Price: $15/month for first 3 months, then $18/month

• Data: 400GB for first 3 months, then 250GB monthly

• 5G: Full access across supported areas

• Roaming: 8GB/month to 7 destinations (Malaysia, Indonesia, Thailand, Taiwan, Bangladesh, Hong Kong, Macau and Sri Lanka)

• Extras:

  • Loyalty perks

  • Lifestyle marketplace

  • Unlimited queries with CirclesAI powered by OpenAI’s latest models

  • Stackable referral bill waivers

  • Referral incentives

Pros: Huge data, no contract, premium perks

Cons: Roaming limited to listed countries only

Best for: Users who want maximum flexibility and bonus tools like Circles AI.

2. Singtel 5G SIM-Only Plan

Singtel is Singapore’s legacy telco and offers robust 5G coverage, but at a premium price.

Key features:

• Price: $55/month

• Data: 200GB 5G

• Roaming: 3GB to select destinations

• Perks: 12-month Disney+ Premium, McAfee Mobile Security, Straits Times, and Spotify

• Contract: 12 months required

Pros: Strong network, bundled entertainment

Cons: Expensive and requires 1-year lock-in

Best for: Premium users who want built-in entertainment perks.

3. Giga 5G SIM-Only

Giga offers contract-free, affordable 5G plans with a travel-friendly twist.

Key features:

• Price: $18.33/month

• Data: 300GB 5G (reverts to 212GB after 3 months)

• Roaming: 94GB across 5 destinations for first 3 months, then 6GB/month

• Talktime/SMS: 800 mins / 800 SMS

• 5G Access: Full, no speed caps

• Referral: 250GB/100GB data rewards

Pros: Good value roaming, generous referral data

Cons: Roaming reverts after 3 months

Best for: Budget travellers and high-data users who frequently visit Malaysia, Taiwan, or Indonesia.

4. M1 5G SIM-Only Plan

M1 offers tiered 5G plans, with bundling options for devices.

Key features:

• Price: Starts from $19/month for 100GB

• Higher tiers: $29 for 150GB, $39 for 200GB

• Perks: Free Caller ID, weekend data boosts, 5G add-ons for speed upgrades

• Optional device bundle available

Pros: Customisable data, wide 5G coverage

Cons: Higher tiers are pricier

Best for: Moderate users who want optional device financing.

5. SIMBA (formerly TPG) 5G Plans

SIMBA offers ultra-affordable 5G plans, often targeting budget-conscious users.

Key features:

• Price: Starts at $10/month

• Data: 100GB local, 1GB roaming to Malaysia, Indonesia, Thailand

• 5G: Supported in most urban areas

• No contract

Pros: Cheapest option

Cons: Fewer perks, slower support

Best for: Light users or students who need just basic connectivity.

Best 5G SIM-Only Plans – Side-by-Side Comparison

Last updated: May 2025

Steps to Activate 5G in Singapore

If you’re switching to a 5G plan, here are the steps to make sure you're set up properly:

1. Check if your phone is 5G-compatible

   Most flagship devices after 2021 support 5G. Mid-tier phones may need a firmware update.

2. Get a 5G-enabled SIM card

   Contact your telco or request a replacement SIM online.

3. Choose a 5G SIM-only plan

   Select a plan that meets your budget and usage.

4. Activate 5G in device settings

   Usually found in Settings > Mobile Networks > Network Mode > 5G/Auto

5. Use your phone in 5G coverage areas

   Singapore’s 5G coverage includes MRT stations, malls, CBD, and most urban zones.

6. Track your usage in-app

   Most telcos now offer app dashboards to monitor 5G data and speed.

Which 5G Plan is Right for You?

Choosing the best plan depends on your specific habits. Here's a quick guide:

• Heavy data user: Go for Circles.Life or Giga with >200GB/month

• Budget-focused: SIMBA offers the cheapest 5G entry point

• Frequent traveller: Giga and Circles.Life offer generous roaming

• Premium user: Singtel is ideal for bundled entertainment and coverage

• No-contract fan: Circles.Life, Giga, and SIMBA are all contract-free

Need help deciding? Use the Circles Data Usage Calculator to estimate your monthly usage.

Frequently Asked Questions (FAQs) About 5G SIM Plans

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

SIMBA offers the cheapest 5G SIM plan at $10/month for 100GB.

Is Circles.Life offering true 5G or 5G-ready?

Circles.Life supports full 5G access in Singapore through supported networks.

Which telco has the best 5G coverage?

Singtel has the widest 5G coverage across MRT lines, CBD, and suburbs.

Are 5G plans faster than 4G?

Yes. 5G offers lower latency, faster speeds, and higher bandwidth than 4G.

Can I use a 5G SIM in a 4G phone?

Yes, but you’ll be limited to 4G speeds. To access 5G speeds, you need a 5G-compatible phone.

Are there contract-free 5G plans in Singapore?

Yes. Circles.Life, Giga, and SIMBA offer no-contract 5G SIM-only plans.

Which plan is best for roaming with 5G?

Giga and Circles.Life offer the best regional roaming options in their 5G plans.

Understanding 5G Coverage in Singapore

Before choosing a 5G plan, it's important to understand how well each provider performs across different areas of Singapore. While all major telcos offer 5G, coverage can vary based on your location.

Urban and CBD Coverage

• Singtel, StarHub, and M1 have the most comprehensive 5G coverage across Marina Bay, Orchard, Raffles Place, and key MRT lines.

• Circles.Life rides on M1’s infrastructure, ensuring a strong 5G signal in dense city areas.

• SIMBA covers core areas but may lack seamless performance in fringe zones.

Suburban and HDB Estates

• Circles.Life and Giga show good signal strength in estates like Ang Mo Kio, Tampines, and Bukit Panjang.

• M1's partnership with Circles ensures consistent speeds in residential zones.

Indoor and Basement Coverage

5G penetration can drop in underground carparks and basements. Providers like Singtel and Circles tend to outperform here due to better infrastructure and antenna density.

5G Speed Test: How Fast Are These Plans?

Based on publicly available speed tests and user-reported performance data:

While real-world usage varies by time and location, all providers are capable of streaming 4K video, gaming, and heavy downloads. Singtel edges out in raw speed, while Circles.Life performs exceptionally well for the price.

5G Plan Features Comparison by User Type

Here’s how each telco’s 5G SIM-only plan performs for different lifestyle needs:

The Rise of Bundled Perks in SIM-Only Plans

SIM-only plans in 2025 are no longer just about talktime and data. Providers are now bundling lifestyle benefits to offer added value:

Circles.Life:

• Free unlimited queries with CirclesAI powered by OpenAI’s latest models

• Marketplace deals: F&B, ride-hailing, gaming

• Stackable referral rewards

• In-app plan customisation

Singtel:

• 12-month Disney+ Premium

• McAfee Mobile Security

• Spotify, Straits Times, and Entertainer apps

Giga:

• Grab voucher promos

• Massive referral data perks

Bundled services enhance the real-world value of these plans. For instance, Circles.Life’s CirclesAI access alone offsets the plan cost for many users.

Contract-Free vs Contract 5G Plans: Which is Better?

Contract-free plans dominate in 2025, especially among digital natives and value-seeking users. Here's a breakdown of the pros and cons:

Contract-Free (e.g., Circles.Life, Giga, SIMBA)

Pros:

• Switch anytime

• Seasonal promotions

• Better control of monthly costs

Cons:

• Fewer bundled devices

• No fixed-price guarantee

Contracted Plans (e.g., Singtel, M1 device bundles)

Pros:

• Device financing with discounts

• Premium content add-ons

• Stable billing

Cons:

• Early termination penalties

• Limited flexibility to upgrade

For users prioritising flexibility, contract-free wins. For those planning to bundle phones, contract plans may still be useful.

Switching Made Easy: Porting Your Number to a 5G Plan

Switching telcos is simpler than ever. Here's how to port your number in under an hour:

1. Choose your new telco and 5G plan

2. Register online or via app (Circles and Giga offer instant eKYC)

3. Request number port-in during sign-up

4. Receive your new SIM/eSIM

5. Wait for switch confirmation (usually within 2 hours)

6. Start using 5G on your new plan

Pro tip: Circles.Life and Giga often offer port-in vouchers or data bonuses during promotional weeks.

What Makes Circles.Life a Standout 5G Provider?

Circles.Life distinguishes itself by integrating next-gen technology into every plan:

• No contracts: Full freedom to cancel or pause

• Massive data: Up to 400GB at just $15/month

• Free GPT-4o access: Unlike any other telco in the world

• User-first design: Intuitive app, instant activation

• Referral benefits: Bill waivers, stackable for multiple referrals

For mobile users who demand freedom, value, and cutting-edge tools, Circles.Life is more than a telco—it’s an all-in-one lifestyle companion.

Choose Smarter, Spend Less, Stay Faster

5G has arrived—and in 2025, it’s no longer a premium luxury but a necessity. Whether you're working from your phone, streaming HD video, playing online games, or hopping across countries, your SIM plan needs to keep up. While Singtel leads in bundled content and ultra-premium offerings, Circles.Life delivers the best blend of price, performance, and flexibility—especially with bonus tools like GPT-4o and loyalty rewards. Giga and SIMBA cater to budget-conscious users, while M1 holds strong for device-bundled contracts.

For most users in Singapore, Circles.Life offers the best 5G SIM-only plan in 2025.

Explore your options, compare features, and upgrade to a plan that truly works for your lifestyle—no contracts, no compromises.

Final Thoughts

The rise of 5G in Singapore brings faster, more reliable mobile internet—without the need to overspend. Whether you're chasing massive data, international perks, or app-based control, 2025 is the year to switch to a plan that truly fits your lifestyle.

Circles.Life stands out for its contract-free 5G, massive data bundles, roaming features, and premium extras like unlimited queries with CirclesAI, powered by OpenAI latest models. 

If you’re looking for a plan that evolves with you—at a price that makes sense - Circles.Life remains a top contender.

Compare 5G SIM-only plans now and switch to a better deal in 2025.