Unlock Unbeatable Value: Your Guide to the Cheapest Mobile SIM Only Plans in Singapore (2025)

Introduction: Discovering the Most Affordable SIM Only Deals

As 2025 progresses, more Singaporeans are reconsidering how they stay connected. The days of signing two-year contracts bundled with new phones are giving way to something smarter: SIM only plans. These plans provide just what you need—mobile data, talktime, and SMS—without the extra baggage of a device or a lock-in contract. They give users the flexibility to change providers, save on monthly bills, and take full control over their mobile experience.

With an increasing number of cheap SIM only plans in Singapore, it’s easier than ever to find one that matches your budget and usage habits. But with so many options, which one is truly the best? This guide is here to help. We’ll explore how SIM only plans work, what makes them so cost-effective, and how to spot the cheapest mobile SIM only plans that offer real value in return. Plus, we’ll shine a spotlight on Circles.Life, a provider that continues to lead the pack with generous data, flexible plans, and exciting perks—all at an affordable price.

Why Choose a Cheap SIM Only Plan?

What is a SIM Only Plan and Why Go for the Cheapest?

A SIM only plan is a mobile subscription that gives you just the SIM card—no phone included, no long-term contract, and no frills you don’t need. That simplicity is what makes it such a hit, especially in a smartphone-saturated market like Singapore. You already have the phone you want. Why pay more for a contract that ties you down and inflates your bill?

Opting for a cheap SIM only plan doesn’t mean compromising on quality. Many of these plans use the same networks as major telcos, so the speed, reliability, and coverage remain the same. What you get instead is:

• Significant cost savings: Most SIM only plans cost 30–50% less than traditional contract plans.

• Complete flexibility: Cancel anytime, switch to a new provider when you find a better deal, or pause your line when you travel.

• Customizability: With plans ranging from 5GB to 350GB and add-ons like roaming and entertainment, you can pay only for what you need.

• Freedom from contracts: No early termination fees, device subsidies, or locked-in agreements.

This makes SIM only plans ideal not only for budget-conscious users, but also for frequent travelers, students, digital nomads, and even seniors who want something simple and affordable.

The Rise of Affordable Virtual Telcos (MVNOs)

The biggest factor driving down SIM only plan prices in Singapore is the rise of Mobile Virtual Network Operators (MVNOs). Unlike traditional telcos, MVNOs like Circles.Life, Gomo, Giga, and TPG don’t own the physical infrastructure (cell towers, etc.). Instead, they lease access to existing telco networks, then build their own services, plans, and customer support on top.

This allows MVNOs to:

• Operate with lower overhead

• Offer simpler digital experiences (via apps, self-service portals)

• Focus on core user needs (like generous data or flexible roaming)

• Pass savings directly to consumers

For customers, this competition has led to a surge in affordable SIM only plans, many priced under $20/month—without cutting corners on data, speed, or user experience.

Comparing the Cheapest Mobile SIM Only Plans in Singapore (Under $20)

There are plenty of low-cost SIM only plans out there—but they’re not all created equal. Some offer huge data bundles at promotional prices. Others keep things simple with 10–30GB and minimal talktime. To help you compare, here’s a table of the best-value SIM only plans in Singapore, updated for April 2025.

This comparison reveals just how much value you can get under $20. If you’re a light user, Zero1 and RedONE are perfect for basic needs. Moderate users can go for Giga or TPG. But if you want massive data without a premium price, Circles.Life and Gomo clearly lead the pack.

Circles.Life: Your Destination for Affordable and Flexible SIM Only Plans

In the world of affordable SIM only deals, Circles.Life is not just another provider—it’s a leader. It consistently ranks among the best-value telcos in Singapore, with massive data allowances, no hidden fees, and perks tailored to modern users.

Here’s what makes Circles.Life the ultimate SIM only destination:

Unmatched Data for the Price

• 350GB of data for just $15/month for 3 months (then 250GB for $18)

• That’s more than 10x the data most plans offer for the same price

Premium Features on a Budget

• Free ChatGPT Plus (worth $26/month), perfect for students, professionals, and creators

• Referral rewards: Get up to $30 in bill waivers for each person you bring in

• Access to discounts on F&B, ride-hailing, gaming, and more through the in-app Marketplace

Roaming, Simplified

• 8GB of roaming monthly to seven countries, with no top-ups required

• Ideal for frequent travelers or regional commuters

True Contract-Free Flexibility

• Pause, cancel, or change plans anytime with no penalty

• All plan changes and support are handled via the user-friendly Circles.Life app

This combination of high-value pricing, real perks, and digital convenience makes Circles.Life one of the best picks not just in the budget space—but in the entire mobile market.

Who Should Consider a Cheap SIM Only Plan?

SIM only plans are not just for budget users—they’re for anyone who wants more control over their mobile spend without sacrificing quality. But depending on your lifestyle and habits, a cheap plan may serve very different purposes:

• Students: Tight budgets and unpredictable schedules make SIM only plans perfect for students. Whether you're binge-watching, studying on the go, or calling home, the flexibility and affordability are unmatched.

• Digital Nomads & Remote Workers: If you work remotely, especially across borders, you need reliable data and roaming. Plans like Circles.Life's roaming-inclusive SIM only plans can save hundreds per year on travel-related top-ups.

• Light Users: Only need data for WhatsApp, light browsing, or checking emails? There are sub-$10 plans with enough data to cover casual use. No reason to pay for more than you need.

• Heavy Users & Streamers: On the opposite end, if you’re constantly on TikTok, Instagram, or Netflix, or use your phone as a hotspot, large-data plans from providers like Circles.Life and Gomo give you the bandwidth without the burn.

• Seniors: SIM only plans offer easy-to-use, low-commitment options for seniors who just want simple calls, messaging, and occasional data without complex contracts or bundled extras they won’t use.

Tips for Choosing the Best Cheap SIM Only Plan

With so many providers and price points, how do you choose the best plan for your needs? Here are a few tips:

• Compare Beyond the Price: A $10 plan with 6GB may seem cheaper than a $15 plan with 250GB, but the latter offers far more value per dollar. Don’t just look at the base price—evaluate what you get.

• Know Your Monthly Usage: Are you a 5GB user or a 50GB user? Check your past usage in your phone settings or telco app. This helps you choose a plan that fits, rather than overpaying "just in case."

• Watch Out for Promo Periods: Many telcos offer limited-time promos like “$15 for 3 months, then $25.” Understand the long-term cost and make sure it’s still within your budget.

• Check for App Functionality: Can you pause, upgrade, downgrade, or top up easily via an app? Telcos like Circles.Life, Giga, and Gomo excel here—no need to call a hotline or visit a retail store.

• Explore Add-Ons: Some budget plans let you add extra roaming, caller ID, or data rollover for small fees. These add-ons can make a cheap plan feel premium—without breaking your budget.

Are SIM Only Plans Really Better Than Contract Plans?

Many users still ask: “If I can get a phone with a contract, isn’t that a better deal?” Not always.

Let’s break it down:

• With Contract Plans, you’re paying monthly for both the data plan and the phone. Over 24 months, this adds up, and the “free phone” usually ends up costing much more than its retail value.

• With SIM Only Plans, you can choose any phone you like, pay upfront or via credit card instalment, and switch plans whenever something better comes along.

📊 Example:

• Contract Plan: $90/month for 24 months = $2,160 (includes phone + data)

• SIM Only Plan (e.g., Circles.Life): $18/month for 24 months = $432

• Add retail phone (e.g., $1,200) = $1,632 → savings: $528

SIM only plans win in transparency, flexibility, and total cost of ownership—especially if you already have a phone or want to upgrade only when it suits you.

Frequently Asked Questions (FAQs)

about Cheapest Mobile SIM Only Plans

What exactly is a cheap SIM only plan?

A cheap SIM only plan is a mobile subscription that provides data, talktime, and SMS—without a device or contract—at an affordable price. Typically, these plans cost under $20/month and cater to users who already have their own phones and want to avoid long-term commitments.

Are cheap SIM only plans less reliable?

No. Most affordable plans in Singapore use major telco networks like Singtel, StarHub, or M1 through MVNO partnerships. As a result, they offer comparable coverage and speed while keeping prices low by reducing overhead costs.

What are the typical data allowances for the cheapest mobile SIM only plans?

Plans under $15 often include 5GB to 50GB of data. Higher-value plans like Circles.Life and Gomo provide 200GB–350GB, especially useful for streaming, gaming, and work-from-home users.

Do the cheapest SIM only plans include roaming?

Not all plans include roaming, and those that do often offer limited data. However, Circles.Life is a standout here, offering 8GB/month of free regional roaming—a benefit rarely found in the under-$20 price range.

Are there any hidden costs associated with cheap SIM only plans?

Reputable providers like Circles.Life, Gomo, and Giga are known for transparent billing, with no hidden charges. Still, users should check if services like caller ID, SIM activation, or roaming add-ons come at extra cost with smaller providers.

Conclusion: Finding Your Perfect Cheap SIM Only Plan with Circles.Life

If you're tired of overpaying for mobile services and being tied down by rigid contracts, it’s time to make the switch to a more flexible, user-friendly alternative. SIM only plans offer the freedom to choose what you need, without paying for what you don’t, and in 2025, the options are more competitive and more affordable than ever before. Whether you're looking for a basic low-cost plan for light usage, or you need a high-data plan for streaming, gaming, or remote work, there’s a SIM only deal in Singapore that fits your lifestyle and budget. The best part? Most of these plans come with no contract, allowing you to change or cancel anytime.

Among the many providers available today, Circles.Life stands out as a clear leader in the affordable SIM only space. It not only offers one of the most generous data packages in its price range (350GB for just $15/month), but also delivers unmatched extras like ChatGPT Plus, monthly roaming, lifestyle vouchers, and a user-first app experience. Everything is designed to give you more freedom, more value, and more control over your mobile life.

So if you're on the hunt for the cheapest mobile SIM only plan in Singapore, look beyond just the price tag. Consider what you’re really getting—data, perks, flexibility, and ongoing savings. And for all of that, Circles.Life delivers like no other.