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Giga eSIM guide: Plans, activation, and switching devices
Giga eSIM in Singapore: Compare 4G and 5G eSIM plans with data rollover, and roaming. Learn how to buy, activate, and transfer eSIMs.
Giga eSIM is one of Singapore’s most flexible digital mobile options, offering affordable data plans, instant activation, and no contract requirements.
But between 4G, 5G, and roaming bundles, it’s easy to get confused about what Giga actually offers, and which plan fits your needs best.
This Giga eSIM guide covers everything you need to know, from plans and pricing to activation, compatible phones, and how to transfer Giga eSIM to a new device. We’ll also introduce Holafly’s unlimited eSIM as a contract-free alternative for long-term users in Singapore.
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Does Giga support eSIM in Singapore?
Yes, Giga eSIM Singapore plans are available for all users. Whether you’re signing up for a new line or switching from another provider, Giga offers full eSIM support with every mobile plan as long as you have an eSIM-compatible phone.
As a digital-only MVNO sub-brand of StarHub, Giga is built for convenience. You can sign up, choose a plan, and activate your number entirely through the eSIM Giga app or website.
Giga eSIM: Plans and pricing
Giga eSIM plans offer a variety of monthly data options, all prepaid, with no lock-in and full eSIM support.
Whether you’re after a basic 4G plan or a Giga 5G eSIM upgrade, there’s an option that fits your usage and budget.
Giga 4G eSIM Plans
These entry-level Giga eSIM plans are valid for 30 days and offer solid value for everyday mobile users. With generous local data allowances, rollover support, and built-in Asia roaming, Giga’s 4G options are designed for simplicity and cost-efficiency.
Here is a quick look at how much Giga eSIM costs in Singapore dollars (SGD):
| Local Data | Talktime & SMS | Asia Roaming | Network | Price (SGD) |
|---|---|---|---|---|
| 100GB | 300 mins + 300 SMS | 2GB Asia roaming | 4G | $10.19 |
| 200GB | 300 mins + 300 SMS | 4GB Asia roaming | 4G | $12.00 |
| 300GB | 300 mins + 300 SMS | 8GB Asia roaming | 5G */ 4G | $15.28 |
* Note: The 300GB plan includes free 5G access for 24 months, after which it reverts to 4G unless extended.
All plans include:
- Free rollover data (unused data carries over)
- Free caller ID
- SIM-only, no contract
- eSIM ready by default
Giga 5G eSIM Plans
If you use a lot of data or need fast speeds across borders, Giga 5G eSIM plans are built for you. These high-capacity plans are valid for 30 days and include generous talktime, extensive Asia and global Giga roaming, as well as high-speed 5G coverage in Singapore and Malaysia.
| Data (SG + MY) | Talktime & SMS | Asia Roaming | Global Roaming | Network | Price (SGD) |
|---|---|---|---|---|---|
| 400GB | 800 mins + 800 SMS | 10GB | 6GB | 5G | $18.33 |
| 500GB | 1,000 mins + 1,000 SMS | 12GB | 10GB | 5G | $20.37 |
| 1TB | 1,500 mins + 1,500 SMS | 16GB | 12GB | 5G | $28.00 |
Every Giga eSIM plan in this tier includes free caller ID and rollover data. If you finish your monthly data allowance, your data access will be paused. You won’t be charged extra, but you’ll need to top up or wait for your next cycle to resume usage.
Which phones support Giga eSIM?
To use a Giga eSIM, your phone must support eSIM and be carrier-unlocked. Most newer iPhones, Samsung Galaxy models, Google Pixel devices, and a growing list of other Android phones are fully compatible.
To check if your phone is eSIM compatible, dial *#06#. If you see an EID number, your device supports eSIM. Also, make sure your phone is not locked to another carrier.
Is Giga eSIM available for Apple Watch?
No, Giga eSIM does not currently support wearable devices such as the Apple Watch. Only smartphones are eligible for eSIM activation.
How to get a Giga eSIM
Buying a Giga eSIM is simple and entirely online. Whether you’re switching providers or starting fresh, the process is fast and fully digital.
What do you need to get a Giga eSIM?
Before you begin, make sure you have:
- An eSIM-compatible, unlocked smartphone
- Stable internet connection during activation
- The Giga app (or access to the website)
- A valid Singapore mobile number or email for registration
- A payment method (credit/debit card, PayNow, or GrabPay)
- A QR code or in-app link for eSIM installation
How to buy a Giga eSIM online
You can buy a Giga eSIM directly from the official website. Just select your preferred plan, verify your details, and activate your eSIM instantly via the Giga app or QR code.
How to get a Giga eSIM in-store
You can’t. At this time, Giga operates as a digital-only service. All sign-ups, purchases, and support are handled online; there is no in-store purchase option available.
How to activate Giga eSIM
Giga eSIM activation online is quick and straightforward. Once you’ve selected a plan and completed the purchase, you’ll receive a QR code or activation link via the Giga app.
Here is how to activate Giga eSIM on iPhone:
- Go to Settings > Mobile Data > Add eSIM.
- Scan the Giga QR code or enter the activation code manually.
- Follow the on-screen instructions to complete setup.
- Ensure the eSIM is set as your active line and mobile data is enabled.
Here is also how to activate Giga eSIM on Android:
- Go to Settings > Network & Internet > SIMs (varies by device).
- Tap Add eSIM or Download SIM.
- Scan the QR code or enter the activation details.
- Confirm activation and set Giga as your default data SIM.
How to convert a Giga SIM to an eSIM
Switching from a physical SIM to a Giga eSIM is quick and fully digital. You can move your number to an eSIM in just a few taps:
- Log in to your Giga account via the app or website.
- Choose “Convert to eSIM” in your plan settings.
- Follow the instructions to scan the QR code or activate it in-app.
No store visits or waiting, your number and plan will be transferred instantly to your eSIM.
How to transfer a Giga eSIM to a new phone
Upgrading your device or switching platforms? You can easily transfer your eSIM to another phone. Whether you’re transferring eSIM on iPhone, moving eSIM on Android, or switching eSIM from iPhone to Android, here’s how to do it:
- Delete your existing eSIM from your current phone using your device settings.
- Log in to your Giga account through the mobile app or web portal on your new phone.
- Choose the transfer or reissue option and follow the steps provided.
- Verify your identity if prompted to complete the process securely.
- Scan the new QR code provided by Giga or activate it directly through the app.
- Enable the eSIM in your device settings and restart your phone.
Other local providers offering eSIM in Singapore
Giga isn’t your only option. If you’re exploring alternatives, several other providers in Singapore also deliver quality eSIM support:
- M1 eSIM
- StarHub eSIM
- Singtel eSIM
- SIMBA eSIM
- GOMO eSIM
- Eight Mobile eSIM
- MyRepublic eSIM
Nevertheless, if unlimited data is your priority, Holafly is one of the best providers offering eSIM in Singapore.
Get online fast with Holafly’s unlimited data plans
Holafly’s eSIM is designed for travellers, digital nomads, and expats who need reliable data without contracts, top-ups, or roaming surprises.
Daily plans start from $1.55 to $7.90 per day, while Holafly Plans start at $49.90 per month. Both include:
- Unlimited data with no caps or throttling
- Near-worldwide coverage
- Instant activation without an app
- Hotspot/tethering support
- 24/7 multilingual customer support
Ultimately, your mobile experience should match your journey; go with Giga for regional value, or opt for Holafly if global, unlimited data is what you’re after.
Unlimited data. Peace of mind.
Make sure you have travel data that's there when you need it most.
Disclaimer: The data in this article is accurate as of August 28th, 2025, and is subject to change.
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Formerly a travel journalist turned marketing copywriter, I found my way back to the travel world with Holafly—my dream company that made remote work possible. My motto? “Dream big and make it happen.” I’m passionate about writing, exploring the world, and staying active through walking, running, swimming, and hiking. I also love learning, reflecting, and connecting with inspiring minds.
