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An eSIM for East Asia from HelloRoam starts at S$5.32 as a full plan, with access to 199+ carrier networks across 185+ countries. Activate via QR code in under two minutes on any eSIM compatible phone. Keep your Singtel, StarHub, or M1 number active on dual SIM.
210+
networks
5G and 4G LTE
5G support
under 2 minutes
activation
![[[networkType]] network speed](/icons/figma-2026/stats-speedometer.svg){kind=icon}
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Prepaid eSIM data plans for East Asia covering Japan, South Korea, China and Taiwan
Affordable eSIM for East Asia, starting from S$5.32. Local 4G LTE and 5G data on trusted carrier networks in East Asia. Works on all eSIM compatible handphones. Cherry blossom season in Japan, the autumn foliage circuit through South Korea, and Lunar New Year travel across China and Taiwan are peak periods for Singapore travellers. A HelloRoam eSIM for East Asia plan activates via QR code before you fly from Changi. Plans start from S$5.32 per destination on local networks across Japan, South Korea, China, and Taiwan without juggling SIM cards at each border. HelloRoam backs every order with a 180-day refund guarantee on unactivated eSIMs.
East Asia eSIM with fast 5G and 4G LTE coverage
HelloRoam East Asia eSIM covers Japan, South Korea, Taiwan, Hong Kong, and Macau on one plan. Singaporean travellers on the Tokyo-Seoul-Taipei circuit stay connected with instant data from the moment they land.
- Plans start at S$5.32 with 5G and 4G LTE speeds
- Coverage from local networks
- Instant activation in under 2 minutes
- 180-day money-back guarantee
- East Asia coverage across major cities
- Network
- 5G and 4G LTE
- Plans From
- S$5.32
- Activation
- Under 2 min
- Guarantee
- 180 days
How to Set Up an eSIM in East Asia
Select a data plan for your destination and complete checkout.
Scan the QR code to install your eSIM straight away.
Your eSIM installs instantly and activates when you land.
Track usage, top up data, and manage all your eSIMs in one place.
Select a data plan for your destination and complete checkout.
Scan the QR code to install your eSIM straight away.
Your eSIM installs instantly and activates when you land.
Track usage, top up data, and manage all your eSIMs in one place.
Trip changed? No worries, we've got you covered!
Plans can change anytime, and that's fine. With HelloRoam, you can request a refund for your eSIM within 180 days of purchase.
Learn more about our refund policyHelloRoam East Asia eSIM vs Singtel, StarHub and M1
When comparing eSIM vs a travel SIM card for East Asia, HelloRoam wins on price. It beats Singtel DataRoam, StarHub RoamEasy, and M1 international roaming add-ons. The cheapest eSIM plan starts from S$5.32, with no activation fee and a 180-day refund on unactivated eSIMs.
| Feature |  | Local provider | Limited data eSIM |
|---|---|---|---|
| 180-day refund (unactivated eSIMs) |  |  | |
| 24/7 live chat support | |  | |
| $0 activation fees | | | |
| Automatic data alerts at 80% usage | | | |
| No data overage charges | | | |
| Instant QR code delivery | | | |
| Premium East Asia carrier networks | | | |
Why Singaporean Travellers Choose an e SIM for East Asia
HelloRoam vs Other eSIM Providers for East Asia
See how HelloRoam compares to Airalo, Holafly, and other eSIM providers for East Asia travel. Singaporean travellers choose HelloRoam for the industry-leading purchase protection guarantee, 24/7 live chat support, and competitive pricing from S$5.32.
| Feature comparison | | Airalo | Holafly | Nomad | Saily | Ubigi |
|---|---|---|---|---|---|---|
| 180-day refund (unactivated eSIMs) | | | | | | |
| 24/7 live chat support | | | | | | |
| A$0 activation fees | | | | | | |
| Automatic data alerts at 80% usage | | | | | | |
| No data overage charges | | | | | | |
| Instant QR code delivery | | | | | | |
| Premium East Asia carrier networks | | | | | | |
| Own branded carrier identity (SPN) | | | | | | |
e SIM Explained: Setting Up eSIM for East Asia
An eSIM card is a digital SIM built directly into your handphone. There is no physical chip and no SIM tray to deal with. Scan a QR code to activate your e SIM in under 2 minutes on any eSIM compatible iPhone or Android. An eSIM for East Asia works as a prepaid data plan with no airport SIM counter, no replacement SIM card, and no carrier contract. Follow the step-by-step setup guide to get connected before your flight from Changi. guide
eSIM Coverage Guide for Singaporean Travellers in East Asia
East Asia hosts three of the world's top five fastest mobile networks. Japan, South Korea, and Taiwan top global mobile network benchmarks. A HelloRoam East Asia regional eSIM connects you to these premium networks for the popular Tokyo-Seoul-Taipei travel circuits that Singaporeans take year-round.
Japan has near-universal network coverage including on the Shinkansen bullet train, all Tokyo subway lines, and in rural mountain areas. NTT Docomo, SoftBank, and au operate 5G in all major cities. Japan is consistently Singapore's most searched and booked East Asia destination.
South Korea has one of the world's highest 5G penetration rates. SK Telecom, KT, and LG Uplus operate dense 5G networks in Seoul, Busan, and Incheon. Coverage on the Seoul Metro is excellent throughout all lines. Jeju Island has strong 4G.
Taiwan connects to Chunghwa Telecom, Taiwan Mobile, and Far EasTone. Taipei's MRT has full underground coverage. Taroko Gorge, Sun Moon Lake, and Kenting are well-served.
Hong Kong has some of the world's densest mobile coverage. All MTR lines and outdoor areas have excellent 4G and 5G. Hong Kong is a popular destination in its own right and also a transit hub for Singaporeans connecting to other East Asian destinations.
Note that mainland China is not included in this plan.
- Japan and South Korea rank among the world's top fastest mobile networks
- All Tokyo and Seoul subway lines have full coverage including underground
- Japan's Shinkansen has in-train 4G and 5G throughout the route
- Hong Kong has near-total coverage across the entire territory
- Mongolia outside Ulaanbaatar has very limited coverage
- China mainland requires a separate plan
SourcesOokla Global Speedtest Index 2025; GSMA 2026
eSIM Travel Tips for East Asia
Japan and South Korea Top the Singapore Travel Charts
Japan and South Korea are the most booked East Asia destinations by Singaporean travellers. Both countries deliver premium connectivity that matches or exceeds what you experience in Singapore. The Tokyo-Seoul combination on one trip is a popular Singaporean travel circuit.
Japan's Shinkansen Has Full Coverage Throughout
Japan's Shinkansen bullet train has 4G and 5G coverage throughout the route. You can stream video, work, or video call from Tokyo to Osaka without interruption. Japan's indoor coverage in shopping malls, arcades, and underground stations is exceptional.
Hong Kong Is Close From Singapore
Flights from Singapore to Hong Kong take about 3.5 hours. Hong Kong has some of the world's densest 4G and 5G coverage across its compact territory. The MTR system has full coverage. Your HelloRoam East Asia eSIM activates automatically when you land at HKIA.
Taiwan Is Worth Adding to Your East Asia Circuit
Taipei's food scene, night markets, and day trips to Taroko Gorge are well-known among Singaporean travellers. Taipei's MRT has full underground coverage from Chunghwa Telecom. The airport MRT from Taoyuan Airport to the city centre has coverage throughout.
Check Phone Band Compatibility for Japan
Japan uses some LTE frequencies not found in all phones. Most modern iPhones and flagship Android devices support Japanese network bands. Older or budget devices may not fully connect to all Japanese bands. Check your phone's LTE band compatibility before travel.
Network Coverage Across East Asia
Japan: NTT Docomo, SoftBank, and au operate nationwide 5G with 4G LTE virtually everywhere including rural Japan. Japan's network quality is consistently a global benchmark.
South Korea: SK Telecom, KT, and LG Uplus have deployed some of the world's densest 5G networks. Seoul's 5G penetration is among the highest globally.
Taiwan: Chunghwa Telecom, Taiwan Mobile, and Far EasTone operate competitive 4G and 5G. Taipei has excellent MRT and urban coverage.
Hong Kong: PCCW, HKT, CSL, and others cover this compact territory completely. Hong Kong is one of the world's most densely networked cities.
Mongolia: Coverage primarily in Ulaanbaatar and main highways. Vast steppe and Gobi Desert have no coverage.
- NTT Docomo (Japan)
- Network carrier
- SSK Telecom (South Korea)
- Network carrier
- KKT (South Korea)
- Network carrier
- CChunghwa Telecom (Taiwan)
- Network carrier
- PPCCW (Hong Kong)
- Network carrier
- MMongolia Telecom
- Network carrier
Regional eSIM vs Local SIMs vs Singapore Carrier Roaming for East Asia Travel
East Asia is a premium travel destination for Singaporeans. Singapore carrier day passes for Japan and South Korea carry high daily charges. A HelloRoam East Asia regional eSIM offers better value for trips of 5 or more days.
Recommended—
One plan covers Japan, South Korea, Taiwan, Hong Kong, and more. Buy before departing Changi. No airport SIM queues in Tokyo or Seoul. Better value than Singtel, StarHub, M1, or Simba daily roaming passes for Japan.
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Airport SIM counters in Tokyo and Seoul have queues. Tourist SIMs require passport registration. Separate SIMs needed for each country. Total cost across Japan, South Korea, and Taiwan is significant.
—
Singtel, StarHub, M1, and Simba day passes for Japan and South Korea carry high daily charges. A 7-day Japan trip at day pass rates adds up quickly. A HelloRoam East Asia regional eSIM is typically more cost-effective.
| Category | Recommended | Airport SIMs in Japan or South Korea | Singapore carrier international roaming (Singtel/StarHub/M1/Simba) |
|---|---|---|---|
| Typical cost | — | — | — |
| Details | One plan covers Japan, South Korea, Taiwan, Hong Kong, and more. Buy before departing Changi. No airport SIM queues in Tokyo or Seoul. Better value than Singtel, StarHub, M1, or Simba daily roaming passes for Japan. | Airport SIM counters in Tokyo and Seoul have queues. Tourist SIMs require passport registration. Separate SIMs needed for each country. Total cost across Japan, South Korea, and Taiwan is significant. | Singtel, StarHub, M1, and Simba day passes for Japan and South Korea carry high daily charges. A 7-day Japan trip at day pass rates adds up quickly. A HelloRoam East Asia regional eSIM is typically more cost-effective. |
Best Times for Singaporean Travellers to Visit East Asia
Japan's spring cherry blossom season (late March to early May) and autumn foliage (October to November) are the most popular periods. Both are heavily booked by Singaporeans and hotels sell out months in advance. Summer (June to August) is hot and humid. Winter is mild in Tokyo by northern hemisphere standards.
South Korea follows similar seasonal patterns. Spring (March to April) and autumn (October to November) are the most popular. Summer is hot with a monsoon season. Winter in Seoul is cold but manageable for urban travel.
Taiwan is pleasant year-round. Spring and autumn are most comfortable. Typhoon season runs June through October.
Hong Kong is best October through April. Singapore's school holidays in June and November-December drive peak bookings to all East Asia destinations.
FAQs About eSIM in East Asia
e-sim East Asia plans from HelloRoam for Japan and South Korea start at S$5.32 per country, with data volume options for each destination. Activate each plan before you fly from Changi. No physical SIM card needed and no contract.
An East Asia e SIM card for a Tokyo, Seoul, and Taipei trip uses per-country plans on local networks from S$5.32 per destination. Set up takes two minutes before you depart Singapore so data is ready from the moment you land at Narita, Incheon, or Taipei Taoyuan Airport. No contract.
For Singaporean travellers heading to East Asia in 2026, HelloRoam is the top-rated eSIM choice. Plans start from S$5.32 in SGD with access to local 4G/5G networks across a wide carrier partnership spanning 185+ countries. Activate via QR code in under 2 minutes before departing from Changi Airport. Your Singtel, StarHub, or M1 number stays active through dual SIM while HelloRoam handles data abroad. You get a 180-day refund on unactivated eSIMs and 24/7 live chat support.
A East Asia eSIM from HelloRoam costs from S$5.32 for the full plan. Compare that to Singtel DataRoam daily passes and StarHub RoamEasy rates, which typically cost S$15 to S$30 per day. HelloRoam connects to local networks in East Asia at local data prices, with no daily roaming surcharges and no carrier contract. All plans include local 4G/5G access with no overage charges.
An eSIM for East Asia from HelloRoam connects to local 4G/5G carrier networks. Your handphone picks the strongest available signal the moment you land. Coverage spans major cities, highways, and most rural areas. HelloRoam has direct partnerships with local networks globally, so you get data speeds comparable to a local prepaid SIM card in East Asia.
Buy your East Asia eSIM before you leave Singapore in three steps. First, select your plan at helloroam.com and complete checkout in SGD. Second, open your handphone Settings, tap Add eSIM or Add Mobile Plan, and scan the QR code from your email. Third, your eSIM installs in under 2 minutes. Set it up the night before your flight from Changi and land connected.
iPhone XS and all newer models support HelloRoam eSIM in East Asia. iPhone 13 and later models support dual eSIM, so your Singtel or StarHub line stays active for calls while HelloRoam handles travel data. For Android, Samsung Galaxy S20 and newer, Google Pixel 3 and later, and most 2019+ Android handphones support eSIM. Check your handphone Settings for an Add eSIM option to confirm compatibility.
Japan and South Korea are both covered on the HelloRoam East Asia regional plan. NTT Docomo, SoftBank, and au in Japan, and SK Telecom, KT, and LG Uplus in South Korea all deliver world-class 5G speeds. HelloRoam eSIM for HelloRoam East Asia eSIM connects to local network with 5G coverage across major tourist and urban areas. Plans start from S$5.32. Activate by scanning a QR code before departure. No physical SIM card or airport queue needed.
Tokyo has near-total 4G and 5G coverage from NTT Docomo, SoftBank, and au. All Tokyo subway lines have coverage including underground stations. Shopping malls, train stations, and outdoor areas are all covered. HelloRoam eSIM for HelloRoam East Asia eSIM connects to local network with 5G coverage across major tourist and urban areas. Plans start from S$5.32. Activate by scanning a QR code before departure. No physical SIM card or airport queue needed.
Seoul has excellent 5G coverage throughout the city from SK Telecom, KT, and LG Uplus. Seoul's entire metropolitan subway has 5G coverage. Busan and Jeju Island are also well-served. HelloRoam eSIM for HelloRoam East Asia eSIM connects to local network with 5G coverage across major tourist and urban areas. Plans start from S$5.32. Activate by scanning a QR code before departure. No physical SIM card or airport queue needed.
