What is eSIM? Benefits, Activation & Comparison with Physical SIM

As mobile technology evolves, so do the ways we stay connected. In recent years, eSIMs have emerged as a game-changing alternative to the traditional SIM card. But what exactly is an eSIM, and how does it work? More importantly, is it the right choice for you?

In this article, we break down everything you need to know about what is eSIM, how it compares with a physical SIM, the benefits of eSIM, how to activate it, and the best eSIM plans currently available in Singapore.

What is eSIM?

eSIM stands for Embedded Subscriber Identity Module. Unlike physical SIM cards that need to be manually inserted into your phone, eSIMs are built directly into your device’s hardware. This means you can connect to a mobile network without needing a physical card. 

Check if your phone supports eSIM here.

So, how does eSIM work?

• An eSIM functions just like a traditional SIM but is embedded in your device and can be activated digitally.

• You download a SIM profile from your mobile carrier, which contains your mobile plan and number.

• It enables you to switch carriers or plans remotely without needing to visit a store or swap out physical hardware.

The convenience, flexibility, and increasing device compatibility make eSIMs a preferred option, especially for tech-savvy users, frequent travelers, and Singapore’s digital-first generation.

Looking for an eSIM-compatible device?

Check our full list of eSIM-supported phones

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eSIM vs. Physical SIM: Is an eSIM Better Than a Physical SIM?

Let’s compare eSIM and physical SIM across key attributes:

Verdict: eSIM Wins for Convenience and Security

For most users in Singapore, eSIM is a clear winner. Whether you're managing dual numbers, switching between data plans, or just want a clutter-free experience, the eSIM offers unmatched flexibility.

Benefits of Using eSIM

Why are more Singaporeans turning to eSIM? Here are some of the top reasons:

• No more SIM card swapping: Seamlessly switch between plans without fiddling with SIM trays.

• Ideal for dual SIM users: eSIM lets you keep your physical SIM and run a second number digitally.

• Perfect for roaming: Load international data plans while traveling—no need to buy a local SIM abroad.

• Environmentally friendly: Fewer plastic SIM cards means less electronic waste.

• Streamlined onboarding: Activate your plan within minutes through your provider's app.

Top eSIM Plans in Singapore (2025)

Here’s a quick comparison of the top eSIM providers in Singapore:

Last updated on: 21 May 2025

Circles.Life’s Borderless eSIM stands out for its large data bundle, flexible usage, and no-contract commitment—making it perfect for power users, travelers, and digital nomads alike.

Top Reasons to Choose an eSIM

Not sure if switching makes sense? Here’s how to know:

• You frequently travel and want to avoid roaming charges.

• You’re tired of physical SIMs and prefer digital convenience.

• You use dual SIM functionality (e.g., work and personal lines).

• You want to try new telcos without lock-in contracts.

• You value fast activation and in-app plan control.

If any of the above applies to you, it’s time to consider switching to eSIM in Singapore.

Tips for New eSIM Users

• Make sure your phone supports eSIM. View eSIM-compatible devices here.

• Download the Circles.Life app or your telco's app to easily activate your plan.

• Check local and international eSIM compatibility if you’re planning to travel.

• Enable Wi-Fi during the activation process for a smooth setup.

• Always back up your eSIM profile before transferring to a new device.

How to Activate eSIM

Activating your Circles.Life eSIM is fast and easy:

For iOS:

1. Go to Settings > Mobile Service > Add eSIM

2. Scan the QR code from your Circles.Life app or email

3. Follow the on-screen steps to complete activation

For Android:

1. Open Settings > Network & Internet > Mobile Network

2. Tap + or Add eSIM

3. Use your camera to scan the QR code

4. Follow the instructions to finish setup

If your phone supports multiple eSIMs, you can store several plans and switch between them easily within your settings.

Why Choose Circles.Life for Your eSIM?

Circles.Life offers more than just data—it delivers value, freedom, and convenience. Here’s why Singaporeans are making the switch:

• Contract-free plans that adapt to your lifestyle

• Generous data bundles starting from 100GB/month

• Roaming included in 7+ countries (e.g., Malaysia, Indonesia)

• Fast digital activation in under 5 minutes

• Built-in AI assistant (ChatGPT Plus) with select plans

• Referral rewards and flexible add-ons

Ready to switch?

Activate your Circles.Life eSIM now.

Real-World Use Cases for eSIM in Singapore

eSIMs offer tangible benefits across many daily use scenarios in Singapore:

1. Remote Work & Digital Nomads

For those working across multiple locations or countries, eSIM lets you activate local data instantly—no more wasting time buying SIMs in each destination.

2. Frequent Business Travelers

Quick-switching between Singapore telcos and overseas carriers without physical SIM juggling makes eSIMs ideal for corporate users.

3. Expats & International Students

eSIMs allow users to keep a local Singapore number while maintaining their home country SIM digitally—ideal for managing contacts in both regions.

4. Smart Devices & Wearables

From smartwatches to tablets and even IoT devices, eSIMs power always-on connectivity without needing SIM trays.

eSIM Compatibility in 2025: Devices That Support eSIM

As of 2025, most mid-range to premium phones now support eSIM. Here's a snapshot of compatible brands:

• Apple: iPhone XR and newer, iPad Pro, iPad Air (3rd Gen+)

• Samsung: Galaxy S20 and up, Z Fold/Flip Series, Note20+

• Google: Pixel 3 and newer (excluding Pixel 3 USA Verizon models)

• Huawei & Oppo: Limited support on newer models depending on region

• Laptops & Tablets: Many Microsoft Surface devices and Apple iPads

If you're unsure, check with your manufacturer or

Circles.Life’s device compatibility list

.

Roaming with eSIM: How It Simplifies Travel

Traditional roaming can be confusing and expensive. eSIMs offer a smarter alternative:

• Preload travel data plans before departure.

• Instantly activate roaming with Circles.Life’s 8GB regional coverage (e.g., Malaysia, Indonesia, Thailand, Taiwan).

• Stay connected as soon as your plane lands—no airport kiosks or roaming charges surprises.

With borderless data bundles from Circles.Life, eSIM users can seamlessly roam across countries without switching SIMs or missing messages.

Security & Privacy Benefits of eSIM

Beyond convenience, eSIMs also offer superior protection for your personal data:

• Less prone to theft or duplication, as there’s no physical card to remove.

• Locked to your device, so even if stolen, your number cannot be reused elsewhere.

• Remote wipe supported: You can deactivate or reassign your number if your phone is lost or stolen.

Combined with app-based security features from providers like Circles.Life, eSIMs are a great option for privacy-conscious users.

Switching to eSIM: What to Expect When Porting Your Number

Worried about losing your existing number when switching to eSIM? Good news—number porting is supported by most telcos in Singapore, including Circles.Life.

Here’s what the process looks like:

1. Sign up for an eSIM plan with your chosen provider.

2. Select “Keep My Number” during activation.

3. Verify identity and wait for porting confirmation (usually within 1 business day).

4. Activate your eSIM with the provided QR code.

The transition is smooth and you won't experience downtime during the switch.

Environmental Impact: Why eSIM Is the Greener Choice

If you're environmentally conscious, eSIM is a small but impactful switch:

• No plastic waste from SIM cards or packaging.

• Reduced shipping emissions as everything is digital.

• Encourages a move toward fully digital telco operations.

  By going digital with eSIM, you contribute to a more sustainable tech ecosystem in Singapore and beyond.

Future of eSIM: What’s Next?

As the mobile world advances, eSIM adoption is only expected to grow:

• More devices will ship eSIM-only (Apple already does this in some regions).

• Multi-profile support will improve (use 2–5 profiles on one device).

• Carrier switching will become faster, enabling users to swap in real time via apps.

In the near future, the traditional SIM card may disappear entirely, and users will rely solely on eSIMs for all their mobile needs.

eSIM for Dual SIM Users: A Game-Changer for Work-Life Separation

In 2025, dual SIM functionality is no longer a luxury—it's a necessity for many Singaporeans who juggle personal and professional lives. eSIM technology enhances this flexibility:

• Use your physical SIM for work and your eSIM for personal use, or vice versa.

• Manage both numbers from a single device, without needing two phones.

• Switch between networks based on signal strength, coverage, or perks.

This is especially useful for freelancers, remote workers, and side hustlers who want to stay connected on two networks without carrying extra hardware.

eSIM for Tourists Visiting Singapore

For tourists entering Singapore, eSIM simplifies connectivity upon arrival. Instead of queuing for a SIM card at Changi Airport, you can:

• Pre-purchase a Singapore travel eSIM online.

• Activate the plan with a QR code on arrival.

• Get immediate access to data for maps, Grab, Google Translate, and messaging apps.

Tourists benefit from cost-effective prepaid eSIM bundles, especially those from providers like Circles.Life that offer multi-country roaming.

eSIM Plans Singapore: What to Look for When Comparing Providers

When comparing eSIM plans in Singapore, don’t just look at pricing. Here are key factors savvy users evaluate:

• Data allocation: How much do you need per month (e.g., 100GB vs 250GB)?

• Contract terms: Is it no-contract, or are you locked in?

• Roaming: Does it include borderless data access for travel in Asia?

• Speed & network: Is 5G available and reliable in your area?

• App support: Can you manage your plan, top up, or troubleshoot directly from an app?

Circles.Life, for example, offers flexible monthly plans with high data, free ChatGPT access, and no long-term lock-in, making it a top contender in the Singapore eSIM market.

Business Benefits: Why Companies Are Moving to eSIM

Many companies in Singapore are switching to eSIM-based plans for their employees due to:

• Streamlined onboarding: Activate or deactivate numbers instantly via dashboard.

• Device management: No need to issue or swap physical SIM cards.

• Cost control: Customizable data limits and alerts per employee.

• Roaming ease: Perfect for teams that travel across Asia frequently.

If you manage a sales or remote team, exploring corporate eSIM plans may reduce operational costs and boost agility.

How to Troubleshoot eSIM Setup Issues

Though eSIM activation is typically smooth, here are a few common fixes:

• eSIM QR Code not working: Ensure you’re scanning with the correct camera app (usually under Settings > Mobile Network).

• eSIM plan not showing: Check if your device supports eSIM and is running the latest OS update.

• No signal: Restart your phone after installing the profile and ensure mobile data is turned on.

If you're using a Circles.Life eSIM, their support team is available via in-app chat and email for fast troubleshooting.

Frequently Asked Questions: Top eSIM Questions Answered

What are the main disadvantages of using an eSIM?

You need a compatible phone, and switching devices may require reconfiguration, but most modern phones and providers make it seamless.

Are eSIMs better than physical SIMs for international travel?

Yes. You can install a local data plan in minutes, even before landing, without having to swap SIMs.

How secure are eSIMs compared to physical SIM cards?

eSIMs are more secure since they can’t be removed or cloned as easily as physical SIM cards.

Can I use both an eSIM and a physical SIM in one device?

Yes, many smartphones now support dual SIM functionality—one eSIM and one physical SIM.

How long will an eSIM take to activate?

With Circles.Life, activation takes less than 5 minutes through the mobile app or website.

How to transfer my eSIM to another device?

You’ll need to delete the profile from your current device and scan a new QR code on the new one. Contact support if needed.

How to troubleshoot my eSIM?

Check your device settings, reinstall the profile, or contact your telco’s support team.

Where to buy eSIM in Singapore?

You can get one directly from telco websites like Circles.Life, Singtel, StarHub, or M1. Circles.Life offers instant digital activation without going to a store.

Final Thoughts: Why eSIM is the Future of Mobile in Singapore

eSIM technology isn’t just a passing trend—it’s becoming the standard for how we connect. With features like fast activation, remote switching, dual SIM flexibility, and added security, it’s clear that eSIM is better than a physical SIM for most users in Singapore.

Whether you’re a frequent traveler, power data user, or someone who values digital-first convenience, switching to eSIM can help simplify your mobile experience. And with providers like Circles.Life offering generous plans without lock-in contracts, there’s never been a better time to make the move.

Circles.Life eSIM Plans put control back in your hands—no queues, no contracts, just high-speed data and total freedom. Thinking of making the switch? Try Circles.Life eSIM today.