What Is Data Roaming? Skip Singtel Fees with eSIM
An eSIM is a digital SIM card built into your phone. It activates over Wi-Fi in minutes. No plastic card, no SIM swap, no roaming fees.
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What Is an eSIM Card? eSIM Explained
What is a eSIM? An eSIM is a digital SIM card built into your phone that gives you instant mobile data in 185+ countries without swapping a physical card. Unlike the removable nano SIM you pick up at a Singtel or StarHub shop, the embedded chip is soldered onto your phone's motherboard and stores carrier profiles in software. Also written as e SIM or e-sim, it connects you to cellular networks for calls, SMS, and mobile data with nothing to insert, lose, or hunt for at Changi Airport Arrivals. What is cellular data? It is the 4G LTE or 5G connection your phone uses for internet, navigation, and apps, the same technology a physical SIM card uses but now connecting you to local networks overseas at local rates.
The GSMA, the industry body that manages the SGP.22 eSIM standard, defines how phones store and switch carrier profiles wirelessly. Also called a virtual SIM or digital SIM card because the entire profile lives in software, the technology is now built into most phones sold in Singapore from 2018 onwards. Compatible models include iPhones (XS through iPhone 16), Samsung Galaxy devices (S20 through Galaxy S25), and Google Pixels (3 through Pixel 9). All five Singapore carriers, Singtel, StarHub, M1, GOMO, and TPG, support eSIM for local plans. HelloRoam, built by FutureSyncs Ltd (Companies House 15950168), adds travel profiles on top, so Singapore travellers skip roaming charges from the moment they land.(Source: GSMA SGP.22 eSIM Specification)
How Does an eSIM Work? (iPhone and Android Setup)
An eSIM works by downloading and storing a carrier profile inside your phone's built-in chip. Once active, it connects you to mobile networks for calls, texts, and mobile data, the same as a physical SIM card. What is data on a mobile phone? It is the cellular internet your phone uses for maps, Grab, messaging, and browsing, delivered through a local carrier profile. Singtel, StarHub, M1, GOMO, and TPG all support eSIM on Singapore home plans. For travel, HelloRoam loads a separate local-rate profile on the same chip. On iPhone, go to Settings, Cellular, Add eSIM. On Android, go to Settings, Network, SIM manager. Most phones released after 2018 include the embedded chip. You can check our compatibility list if you are unsure about your model.(Source: GSMA SGP.22 eSIM Specification) check our compatibility list
Setup takes about 5 minutes. Buy a HelloRoam plan online, open your confirmation email, and scan the QR code. Your physical Singtel, StarHub, or M1 SIM stays in place the whole time. Both lines run in dual SIM mode at once. Your Singapore SIM keeps your home number active so friends and family can reach you, while the HelloRoam eSIM handles data at local rates in Japan, Korea, Thailand, Malaysia, or Australia. Set up before you leave for Changi and your data is ready the moment you land. What is eSIM on iPhone? On models from XS and newer: Settings, Cellular, Add eSIM, then scan the QR code. You can store multiple profiles and switch between them in Settings at any time.
How Do You Set Up an eSIM?
Choose a data plan for your destination and complete payment online or through the HelloRoam app.
Your plan installs immediately. It activates when you arrive at your destination country.
Track your remaining data, top up when needed, and manage all eSIM plans from the HelloRoam app.
Choose a data plan for your destination and complete payment online or through the HelloRoam app.
Your plan installs immediately. It activates when you arrive at your destination country.
Track your remaining data, top up when needed, and manage all eSIM plans from the HelloRoam app.
Why eSIM Suits Singapore Travellers: Key Advantages Explained
eSIM Limitations to Know Before You Buy
eSIM plans give you local data rates abroad without daily roaming charges from your Singapore carrier. You skip the SIM card counter at Changi, activate before you fly, and manage everything from your phone. Here is what you gain by switching from a physical SIM card to a HelloRoam plan.
No daily roaming fees
Singtel ReadyRoam, StarHub DataTravel, and M1 Data Passport each charge around SGD 10 per day the moment you land overseas. A HelloRoam e SIM connects you directly to local networks at flat prepaid rates, so that daily fee never appears on your bill.
Switch networks without swapping cards
Your phone stores multiple eSIM profiles at once. Fly from Kuala Lumpur to Tokyo to Seoul and switch networks in Settings without touching a physical card.
Pay only for what your trip needs
Off to Bangkok for a long weekend? A 3-day plan covers exactly what you need. You pay only for the data your trip uses, not a full monthly bundle.
Frees up space inside your phone
Removing the physical SIM tray gives phone makers room for a larger battery or improved hardware. That space benefits the devices Singaporeans rely on every day.
Cannot be pickpocketed or removed
Bag taken at a night market or phone left on the MRT? Your eSIM stays soldered to the circuit board. Nobody can pull it out or steal it.
Less plastic on every trip
One fewer plastic SIM card per trip. A straightforward step toward greener travel for the millions of Singapore travellers who fly regularly.
Not sure if your phone supports eSIM?
Most phones released after 2019 support eSIM, including iPhone XS through iPhone 16, Samsung Galaxy S20 through Galaxy S25, and Google Pixel 3 through Pixel 9. The technology does not affect your physical SIM card or phone number. Many phones store 8 or more profiles at once. Check your device before your next flight from Changi.
Check CompatibilityeSIM vs SIM Card: What Is the Difference?
A SIM card is a small physical chip you buy at a Singtel, StarHub, or M1 shop, or pick up at Changi Airport Arrivals. An eSIM is an embedded SIM that does the same job without a removable card. Singapore's IMDA regulates both technologies under the same framework. Physical SIM vs eSIM: both handle calls, texts, and mobile data. The digital version wins on flexibility, no queuing at Changi Terminal 1 or Terminal 3 SIM counters, no risk of dropping a card in transit, and no need to contact your carrier to unlock the phone before travelling. An e SIM, also written as e-sim or electronic SIM, stores the carrier profile in software, not on a removable chip.
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Compatibility
Use abroadeSIM vs Data Roaming: How Much Can Singapore Travellers Save?
Singtel ReadyRoam and StarHub DataTravel charge SGD 8 to SGD 27 per day for data roaming overseas. HelloRoam eSIM plans connect you to local networks at flat prepaid rates, as of April 2026. A travel e SIM costs far less than activating a roaming add-on from your Singapore carrier before a trip to Japan, South Korea, or Thailand.
See our complete eSIM vs roaming cost breakdown with real trip scenarios and savings estimates.
Cut up to 84% off
roaming costs
HelloRoam plans start at S$1.32. No contracts, no hidden charges, and a 180-day money-back guarantee.(Source: HelloRoam pricing analysis, 2026)
Browse PlansCommon eSIM Problems and Fixes
Running into a problem? Our 24/7 support team handles these issues every day for Singapore travellers. Here are quick fixes for the most common eSIM setup problems, from QR codes that will not scan at home to data that does not connect after clearing immigration at Narita, Incheon, or Suvarnabhumi.
QR code will not scan
No data service after activation
eSIM not showing in settings
Cannot remove an old eSIM profile
Two eSIMs causing conflicts
Activation code rejected
“eSIM technology is the biggest shift in mobile connectivity since the smartphone. Travelers no longer need to choose between staying connected and overpaying.”
Popular eSIM Destinations
Frequently Asked eSIM Questions
Yes, most modern phones run both at the same time. This is called dual SIM mode. Keep your Singtel, StarHub, or M1 SIM active for calls and texts so friends and family in Singapore can reach you on your regular number. Add a HelloRoam eSIM as a second line to handle mobile data abroad at local rates. On iPhone, go to Settings, Cellular, and set each line's role. On Android, go to Settings, Network, SIM manager and assign data to your HelloRoam e-sim line. Both run independently, so you get local data rates without giving up your Singapore number.
You activate an eSIM yourself in about 5 minutes without visiting any shop or counter. Purchase a HelloRoam plan online or in the app, then open your confirmation email. On iPhone: go to Settings, Cellular, Add eSIM, and scan the QR code from your email. On Android: go to Settings, Network, SIM manager, tap Add, and scan the QR code. Your phone downloads the carrier profile over Wi-Fi. Once installed, the eSIM activates automatically when your phone detects the destination network. Set up at home before heading to Changi to avoid any delays on arrival.
Singtel, StarHub, and M1 all support embedded SIM on their home Singapore plans. For international travel data, HelloRoam connects you to local partner networks in 185+ countries at flat prepaid rates, lower than what Singapore carriers charge for overseas roaming. What is data roaming? It is when your Singapore SIM connects to a foreign network, typically at SGD 8 to SGD 27 per day. A HelloRoam e-sim plan avoids that entirely by giving you a local-rate profile for each destination.
Yes, an eSIM works for day trips to Johor Bahru (JB). Malaysia is fully covered by HelloRoam. Buy a short-duration plan before you drive or take the bus across the Causeway. Your eSIM activates the moment your phone connects to a Malaysian network. Keep your Singapore SIM active for calls back home, while your HelloRoam e-sim handles data in JB at local rates. The same applies for Batam and Bintan day trips: both are covered by HelloRoam plans for Indonesia.
No, you do not need to buy a local SIM card at Changi Airport when you have a HelloRoam eSIM. Buy a plan online before you fly, scan the QR code to install it, and your phone connects to the destination network the moment you land. Skip the SIM counter queue at Changi Arrivals entirely. HelloRoam covers 185+ countries, including Japan, South Korea, Thailand, Australia, and Malaysia, so one account handles all your trips.
Yes, HelloRoam covers multi-country ASEAN trips. Buy separate plans for each country, Thailand, Malaysia, Indonesia, Vietnam, the Philippines, or check if a regional plan covers your itinerary. Each plan activates automatically when your phone detects the local network at each destination. You can store all the profiles on your phone before you depart and switch between them in Settings. There is no need to swap a physical card or visit a local shop at each stop.
Yes, HelloRoam supports hotspot and tethering on most compatible phones. Turn on Personal Hotspot in your phone Settings and share your travel data with a laptop, tablet, or family member's phone. Hotspot usage drains data faster than browsing on your phone alone. Streaming or downloading over a hotspot can use 1 to 2GB per hour. If you plan to share data during your trip, pick a larger data plan or an unlimited option to avoid running out mid-journey.
HelloRoam eSIM covers Japan and South Korea fully. Both are among the most popular destinations for Singapore travellers. Japan plans connect to leading local networks for reliable 4G LTE and 5G across Tokyo, Osaka, Kyoto, and Hokkaido. South Korea plans work on all major networks in Seoul, Busan, and Jeju. Buy both plans before your flight from Changi and switch between them in Settings when you cross the border or fly between the two countries.
HelloRoam suits corporate travel from Singapore well. Buy plans for each destination country, install them before your trip, and your phone connects to local networks at flat data rates with no daily roaming charges from Singtel, StarHub, or M1. There are no contracts or monthly fees. Each plan activates only when you arrive at the destination, so unused days before your trip do not count. HelloRoam covers 185+ countries, which handles most corporate travel itineraries from Singapore.
A tourist SIM card from a local shop gives you a physical card, sometimes at similar data rates, but requires queuing at an airport counter or telco store, ID verification, and collecting a card. A HelloRoam e-sim requires none of that. You buy online in minutes, scan a QR code, and the plan installs on your phone before you leave home. There is no card to insert, no activation counter, and no plastic to discard afterwards. For frequent flyers from Singapore, the fuss-free digital option is the better fit.
Yes, you keep your Singapore number when you use a HelloRoam travel eSIM. HelloRoam travel plans are data-only and do not assign a new phone number. Your Singtel, StarHub, or M1 SIM stays active in your physical SIM slot, handling calls and texts on your regular Singapore number. The HelloRoam eSIM line runs alongside it, handling mobile data at local rates abroad. For voice calls over data, use WhatsApp, FaceTime, or Zoom on your HelloRoam data connection.
HelloRoam covers 185+ countries, including the most popular destinations for Singapore travellers: Japan, South Korea, Thailand, Australia, the United Kingdom, the United States, and Malaysia. ASEAN destinations including Indonesia, Vietnam, the Philippines, and Cambodia are also covered. You can browse all countries on the HelloRoam app or website before purchasing. Plans start at S$1.32 with no contracts, 84%.
Samsung Galaxy S20, S21, S22, S23, S24, and S25 models all support eSIM in Singapore. Samsung added embedded SIM support to its flagship Galaxy S range from the S20 in 2020. The Galaxy Z Fold and Z Flip foldable series also support eSIM. Budget A-series Galaxy phones may not include the chip, so check your specific model in Settings, Connections, SIM manager. The HelloRoam compatibility checker lists all supported Samsung models. Once confirmed, install a HelloRoam plan the same way you would on any other Android device.
Yes, you can buy a HelloRoam plan now and use it weeks or months later. The validity period starts when your phone first connects to the destination network, not when you purchase. Buy before your trip to lock in the current price and have it ready to go. Your QR code stays valid until you scan and install it. Once installed, the profile sits on your phone until you activate it at your destination.
Data roaming is when your Singapore carrier, Singtel, StarHub, or M1, connects your phone to a foreign network while you are travelling and bills you at an international rate. These charges typically run SGD 8 to SGD 27 per day on top of your regular plan. A HelloRoam e-sim avoids roaming entirely. Your phone connects directly to a local carrier network at the destination through the eSIM profile, which is a separate prepaid plan at a flat rate. You turn off Data Roaming on your physical SIM line to prevent charges from your Singapore carrier, then enable Data Roaming on your HelloRoam eSIM line to use data abroad.
To top up your HelloRoam eSIM data while travelling, open the HelloRoam app, go to My eSIM, and select your active plan. Choose a top-up or purchase a new plan for the same country. Payment processes instantly and the additional data is available within minutes. You do not need to scan a new QR code for a top-up on an existing plan. Make sure you have a data connection or access to Wi-Fi before your current plan runs out so the purchase completes without interruption.
You know your HelloRoam eSIM is active and working when you see your data connection indicator (4G, LTE, or 5G) on the correct SIM line in your status bar. On iPhone, go to Settings, Cellular, and check that the HelloRoam line shows as active. On Android, go to Settings, Network, SIM manager and confirm the eSIM is enabled. If you have no connection after landing, restart your phone and ensure Data Roaming is turned on for the HelloRoam line. The HelloRoam app also shows your remaining data balance and plan status in real time.
Yes, a HelloRoam eSIM works for a quick day trip to Johor Bahru without buying a Malaysian SIM. Malaysia is covered, and your eSIM activates the moment your phone connects to a Malaysian network after you cross the Causeway or Second Link. Buy a short-duration Malaysia plan before you leave Singapore, keep your Singtel, StarHub, or M1 SIM active for calls back home, and your HelloRoam e-sim handles data in JB at local rates. No queuing for a Malaysian SIM at JB Sentral or CIQ.
Sources
- GSMA eSIM Specification (SGP.22)(Accessed April 2026)
- ITU-T Recommendation E.118 — International Telecommunication Charge Card(Accessed April 2026)
- Apple — About eSIM(Accessed April 2026)