HelloRoam sells prepaid eSIM data plans for Southeast Asia starting at £2.98. Your eSIM connects to local 4G/5G networks the moment you land. Activate by QR code in under two minutes. Keep your EE, Vodafone or Three number on dual SIM while your eSIM handles data.
- Mobile networks
212+- network type
4G LTE with 5G in capitals- Setup
under two minutes
Last updated
Your cheapest eSIM for Southeast Asia plan with local network coverage
Cheap eSIM for Southeast Asia, starting from £2.98. Local 4G/5G data on local partner networks in Southeast Asia. Works on any carrier-unlocked, eSIM-compatible phone. A HelloRoam travel eSIM Southeast Asia plan starts at £2.98 on Local network provider networks across Thailand, Vietnam, Indonesia, Malaysia, Singapore, and the Philippines. Activate by QR before your Heathrow or Gatwick flight and arrive at any regional airport already connected. No contract required and a 180-day money-back guarantee on unactivated eSIMs covers every plan.
Southeast Asia eSIM with 4G LTE with 5G in capitals coverage
HelloRoam Southeast Asia eSIM covers Thailand, Malaysia, and Singapore on one plan. British island hoppers and backpackers stay connected as they cross borders without buying a SIM in every country. Plans start from £2.98.
- Plans start at £2.98 with 4G LTE with 5G in capitals speeds
- Coverage from local networks
- Instant activation in under 2 minutes
- 180-day refund on unactivated eSIMs
- Southeast Asia coverage across major cities
- Network
- 4G LTE with 5G in capitals
- Plans From
- £2.98
- Activation
- Under 2 min
- Refund
- 180 days if unactivated
How to Set Up an eSIM in Southeast Asia
Follow these steps to get your eSIM sorted on iPhone or Android before your holiday. Works for any eSIM for international travel, no replacement SIM, no shop visit.
Set up an eSIM on your iPhone for travel from the UK
Set up an eSIM on your Android for travel from the UK
- 1
Choose your plan and checkout online
Choose a data plan for your destination and complete your purchase in GBP.
2Scan the QR code
Scan the QR code to install your eSIM straight away.
- 3
Activate in minutes: ready on arrival
Your eSIM installs instantly and activates when you land.
4Manage it all from our mobile app
Track usage, top up data, and manage all your eSIMs in one place.
Holiday changed? Not to worry, your money is safe.
Plans change, and that's fine. With HelloRoam, an eSIM that was never activated (not installed or scanned) qualifies for a full refund within 180 days of purchase.
Learn more about our refund policyHelloRoam Southeast Asia eSIM vs a travel SIM card or EE, Vodafone and Three roaming
Comparing an eSIM with a travel SIM card for Southeast Asia? The eSIM skips the airport SIM kiosk. EE and Vodafone add a daily fee for roaming on many plans, and Three's Go Roam comes with a data limit. HelloRoam sells a prepaid eSIM for Southeast Asia from £2.98, with a 180-day refund on unactivated eSIMs.
Why UK Travellers Pick HelloRoam e-sim for Southeast Asia
Round-the-clock live chat support
Need help at 2am in Tokyo or midnight in Paris? HelloRoam support is available 24/7. Message us by live chat, WhatsApp or email at help@helloroam.com. Mobile data problems don't wait for office hours, and neither do we.
Best eSIM for Southeast Asia
Get data at 4G/5G speeds the moment you land in Southeast Asia. Skip roaming fees from your UK network, such as EE or Vodafone. HelloRoam connects you to local carrier networks in minutes, whether you are travelling or working. You are online before you clear customs.
Dual SIM ready
Keep your UK mobile number active for calls and texts on your main SIM. HelloRoam runs travel data on a second eSIM line on any dual SIM compatible phone. No need to choose between your EE or Vodafone line and your holiday data. Your wireless connectivity abroad stays separate from your home plan, so there are no bill surprises when you return.
212+ carrier networks including Southeast Asia
HelloRoam eSIM connects to 212+ carrier networks across 185+ countries. Your phone joins a partner 4G/5G network in Southeast Asia automatically, with no manual carrier selection needed. Speeds depend on the local network and where you are.
Data alerts before you run out
HelloRoam emails you as your data runs low on a fixed plan, so you can top up or buy a new plan in time. Where your plan allows it, top up from the app before the plan expires, without reinstalling your eSIM or visiting a shop. Adding a fresh prepaid data package takes under a minute from your account dashboard.
Local network speeds in Southeast Asia
HelloRoam eSIM connects to local 4G/5G networks in Southeast Asia for one prepaid HelloRoam price. Use it for navigation, video calls and streaming, without paying EE or Vodafone daily roaming rates. Speeds depend on the local network and where you are.
Global and regional plans
Visiting more than one country? HelloRoam regional eSIMs cover many countries across Europe, Asia, the Americas and more in a single purchase. Unlimited data plans work for longer holidays. One QR code, no border hassle. A single regional plan gives you mobile data and wireless connectivity across multiple countries without ever swapping a physical SIM card.
Hotspot and data sharing in Southeast Asia
Share your Southeast Asia eSIM data with a laptop or tablet using your phone's mobile hotspot. No extra charges and no separate setup needed. Works on all eSIM compatible phones with data sharing enabled. It is a practical way to keep a travel companion or work device running on the same prepaid data package at no added cost.
eSIM Prices for Southeast Asia
HelloRoam, the best eSIM Southeast Asia. Compare plans from 1 to 30 days and pick the right data for your trip.
| Number of days | Price |
|---|---|
| 1 day | £2.68 |
| 3 days | £7.65 |
| 7 days | £16.54 |
| 15 days | £32.22 |
| 22 days | £43.71 |
| 30 days | £54.77 |
HelloRoam vs Other eSIM Providers for Southeast Asia
See how HelloRoam compares with Airalo, Holafly, Nomad, Saily and Ubigi for Southeast Asia. The table covers a 180-day refund on unactivated eSIMs, data overage charges and instant QR code delivery.
| Feature comparison | HelloRoam | Airalo | Holafly | Nomad | Saily | Ubigi |
|---|---|---|---|---|---|---|
| 180-day refund (unactivated eSIMs) |  Feature available |  Feature not available |  Feature available | Feature not available | Feature not available | Feature not available |
| No data overage charges | Feature available | Feature available | Feature available | Feature available | Feature available | Feature available |
| Instant QR code delivery | Feature available | Feature available | Feature available | Feature available | Feature available | Feature available |
What Is an e SIM? How eSIM Works in Southeast Asia
An eSIM card is a digital SIM built into your phone. There is no plastic chip and no SIM tray to open. Scan a QR code to activate your e SIM in under two minutes on any eSIM compatible iPhone or Android. It works as a prepaid international data plan for Southeast Asia travel with no airport SIM shop queue, no replacement SIM card, and no carrier contract. Mobile data through an eSIM connects to local in-country networks, giving you the same wireless connectivity as a resident rather than a roaming tourist. Follow the step-by-step setup guide to get connected before your flight from Heathrow, Gatwick, or any UK airport. guide
eSIM coverage guide for Southeast Asia travel from the UK
Thailand, Malaysia, and Singapore form one of Southeast Asia's most popular travel routes, and staying connected across them used to mean a new SIM at every border.
A HelloRoam Southeast Asia regional eSIM replaces that hassle with one plan that switches carriers automatically as you travel from Thailand into Malaysia and on to Singapore.
Singapore leads the region with near-perfect 4G and 5G coverage from Singtel, StarHub, and M1. It is the region's most reliable data hub and works as a perfect test point before continuing to countries with weaker infrastructure.
Thailand is the region's top-performing network outside Singapore, led by AIS, DTAC, and True Move. Bangkok, Chiang Mai, Phuket, and Pattaya all have strong coverage. Popular islands like Koh Samui, Koh Phangan, and Koh Lanta have 4G in resort areas. Remote northern highlands have gaps.
Malaysia has excellent coverage in Kuala Lumpur and Penang. East Malaysia on Borneo has 4G in Kota Kinabalu and Kuching but very limited coverage in the rainforest and rural interior.
- Covers Thailand, Malaysia, and Singapore on one plan
- Singapore provides the region's most reliable 5G network
- Thailand and Malaysia have strong overall coverage
- Island hopping means losing data between ferry stops
- East Malaysia's rainforest interior has very limited coverage
- Download offline maps before heading into rural areas
- GSMA Mobile Economy Southeast Asia 2025;
- Ookla Speedtest Southeast Asia 2025
eSIM Travel Tips for Southeast Asia
No data on island ferry crossings
Ferry routes between islands, such as Thailand's Gulf islands, have no mobile coverage once you leave the harbour. Download guesthouse addresses, ferry timetables, and offline maps for your destination island before boarding. GPS continues to work from your phone's hardware without data.
Thailand's northern highlands have coverage gaps
The Golden Triangle area in Thailand's far north has limited 4G coverage. Chiang Rai's city centre is covered, but mountain villages and border crossing areas have gaps. Download offline maps before departing.
Singapore is your reliability checkpoint
When transiting through Singapore Changi Airport, test your HelloRoam eSIM thoroughly. Singapore's network is near-flawless and any eSIM activation issues show up clearly here. Resolving any problems in Singapore (with excellent airport Wi-Fi as backup) is far easier than discovering issues later in your trip.
Emergency numbers vary across Southeast Asia
Emergency numbers differ significantly across Southeast Asia. Thailand: 191 (police), 1669 (ambulance). Singapore: 999. Malaysia: 999. Save country-specific numbers before each border crossing.
Network coverage across Southeast Asia: what British travellers need to know
Southeast Asia's mobile markets are among the world's fastest-growing, driven by young populations and high smartphone adoption.
Singapore is the benchmark network. Singtel, StarHub, and M1 compete in a tiny, dense market with near-universal 5G. Changi Airport has some of the world's best airport connectivity.
Thailand's AIS consistently ranks as Southeast Asia's top network outside Singapore in GSMA and Ookla indices. True Move operates 5G in Bangkok and is expanding nationally. Coverage outside cities is generally better than regional peers.
Maxis, Celcom, and Digi lead in Peninsular Malaysia. Kuala Lumpur and Penang are excellent. East Malaysia (Borneo) has 4G in Kota Kinabalu and Kuching but very limited coverage in rainforest and rural interior.
- AIS (Thailand)
- Singtel (Singapore)
- Celcom (Malaysia)
HelloRoam Southeast Asia eSIM vs UK carrier charges for British travellers
For a trip across Thailand, Malaysia, and Singapore, a regional eSIM eliminates SIM buying at every border crossing.
| Category | HelloRoam Regional Southeast Asia eSIM Recommended | Individual country SIM cards | Standard roaming |
|---|---|---|---|
| Typical cost | From £2.98 total | — | — |
| Details | One plan for Thailand, Malaysia, and Singapore. No SIM hunt at each border. Automatic carrier switching from Thailand to Malaysia to Singapore. Consistent cost for the whole trip. Activates at the airport instantly. | New SIM needed at each border crossing. Registration varies by country and can take time. You lose your number at each country. Total cost for five to six countries adds up significantly. | UK carriers charge daily fees per country. A 30-day Southeast Asia trip costs significant daily charges. Most plans throttle to 2G or 3G after a small daily cap. |
Prices approximate as of . Actual savings vary.
Best times for Southeast Asia travel data
Thailand's dry season generally runs from November to April. This is peak travel season, and networks in popular tourist areas like Koh Samui face heavy demand.
Explore Countries in Southeast Asia
Thailand
From $3
HelloRoam offers Thailand eSIM plans for Bangkok, Phuket, and Chiang Mai. Connect the moment you land.
AIS and TrueMove H run 5G in Bangkok. Coverage reaches Thai islands but drops in rural areas.
Malaysia
From $3
HelloRoam provides eSIM data across Malaysia, from Kuala Lumpur to Penang and Langkawi.
CelcomDigi and U Mobile run 5G in Kuala Lumpur. Signal thins in Borneo's interior.
Singapore
From $3
HelloRoam provides eSIM data for Singapore. Get fast coverage across the entire city-state.
StarHub, M1, and SingTel run 5G in Singapore. MRT has full underground coverage.
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Reviews
HelloRoam eSIM Reviews from UK Travellers
Real reviews from Trustpilot and the App Store, quoted as written.
40k+ travellers have used HelloRoam
Cat
On a trip to Europe, my hotel Wi-Fi was so slow and outside Wi-Fi was unreliable. I couldn’t take it anymore so I got helloroam for a few days. It was tricky to set up correctly because of the primary settings (with my original number). But I reached out to their customer service via WhatsApp. Super responsive and helpful, with specific and clear steps to troubleshoot. Appreciate having 4G roaming instead of being stuck with in and out Wi-Fi during my trip!!
Rated 5 out of 5 by this reviewer
Very good experience! The eSIM was easy to set up and worked great in London. It was much cheaper than it would have been to use my own operator there.
Ilona
Rated 5 out of 5 by this reviewer
metulker
Hard to set up but help was good
Rated 5 out of 5 by this reviewer
Reuben
Really happy with HelloRoam. Everything worked as expected, from messaging and Google Maps through to streaming without any issues. Easy to use, reliable and affordable. Would happily use them again when travelling.
Rated 5 out of 5 by this reviewer
Angeline
Reliable connection. Reasonable pricing.
Rated 4 out of 5 by this reviewer
Common Questions About Southeast Asia eSIM
How much does an eSIM for Southeast Asia cost for British backpackers on multi-country routes?
An unlimited data eSIM Southeast Asia from HelloRoam starts at £2.98 on Local network provider 4G/5G networks. Activate by QR code before your flight from the UK and arrive at Suvarnabhumi, Ngurah Rai, or Changi already connected. HelloRoam includes a 180-day money-back guarantee on unactivated eSIMs with every plan.
Which Southeast Asia eSIM plan covers island-hopping between Thailand, Bali, and the Philippines?
A prepaid SIM card Southeast Asia from HelloRoam activates by QR code before your flight, giving instant local data. One QR activation before your Heathrow departure handles every island-hopping border on the route. No contract and no card swap at any crossing.
Does a Southeast Asia eSIM cover Thailand, Vietnam, Indonesia, and the Philippines on one plan?
A HelloRoam Southeast Asia eSIM plan covers main destinations across the region on Local network provider 4G/5G networks from £2.98 on qualifying plans. Exact country coverage varies by plan tier. Check the HelloRoam plan selector before purchasing to confirm which Southeast Asian nations your chosen plan includes.
Is a Southeast Asia eSIM the most practical option for British backpackers island-hopping?
Buying a local SIM card at each Southeast Asian island ferry port involves registration queues and language barriers. A HelloRoam eSIM for Southeast Asia covers multiple countries from £2.98 on Local network provider 4G/5G networks with one QR code installed at home before you fly from Heathrow. Skip every SIM counter on the whole backpacking route.
Does one eSIM work across all of Southeast Asia?
No. The HelloRoam Southeast Asia eSIM covers Thailand, Malaysia, and Singapore on one plan. Vietnam, Indonesia, the Philippines, and Laos are not on this plan, but the Asia plan covers all four. Your phone switches carriers automatically at each border.
Does a Southeast Asia eSIM work in Thailand?
Thailand is covered by HelloRoam Southeast Asia plans. Bangkok, Chiang Mai, Phuket, and Pattaya connect to AIS, DTAC, and True Move networks. Popular islands have resort-area coverage. Remote northern highlands have limited signal. AIS is considered Southeast Asia's top network outside Singapore.
Does a Southeast Asia eSIM work in Vietnam?
No. Vietnam is not on the Southeast Asia plan's country list, but the Asia and Global plans include Vietnam, and HelloRoam also sells a separate Vietnam eSIM.
Does a Southeast Asia eSIM work in Singapore?
Singapore has near-perfect 4G and 5G coverage from Singtel, StarHub, and M1. Changi Airport is one of the world's best-connected airports. A HelloRoam eSIM works everywhere in Singapore from the airport to Marina Bay to Sentosa. Singapore serves as a reliable connectivity checkpoint before continuing to other Southeast Asian countries.
Does a Southeast Asia eSIM work in Malaysia?
Malaysia is covered by HelloRoam Southeast Asia plans. Kuala Lumpur, Penang, and Johor Bahru have excellent 4G and 5G. East Malaysia (Kota Kinabalu in Sabah, Kuching in Sarawak) has urban coverage with limited reach into rainforest and rural interior areas.
Does a Southeast Asia eSIM work in the Philippines?
No. The Philippines is not on the Southeast Asia plan's country list, but the Asia and Global plans include the Philippines, and HelloRoam also sells a separate Philippines eSIM.
