Travel tips · Connectivity
Best eSIMs for Asia
Country-by-country recommendations that actually work — no roaming surprises.
Skip expensive roaming charges, avoid searching for local SIM cards at the airport, and activate mobile data in minutes.
Plan Your TripWhat's an eSIM?
A digital SIM you install before you fly
An eSIM is a digital SIM that lets you buy mobile data before you travel — no plastic card, no airport queues, no roaming fees.
- No physical SIM card required
- Keep your normal phone number active
- Activate before you land
- Avoid expensive roaming fees
- Switch between countries easily
- Buy extra data whenever needed
At a glance
Quick provider comparison
| Provider | Best for | Countries | Starting price |
|---|---|---|---|
| Airalo | Budget travellers | 200+ | From around £4 |
| Nomad | Great value | 170+ | From around £5 |
| Holafly | Unlimited data | 160+ | From around £18 |
| Saily | Easy to use | 190+ | Competitive pricing |
| Jetpac | Excellent for Asia | Many Asian countries | Budget-friendly |
Prices vary depending on destination, duration and data allowance.
By destination
Best eSIM by country
Thailand
Recommended · Airalo or Saily
Reliable throughout Bangkok, Chiang Mai, Phuket, Krabi and most tourist destinations. Excellent coverage.
Vietnam
Recommended · Airalo
Very good coverage across Hanoi, Ho Chi Minh City, Da Nang, Hoi An and Ninh Binh. Signal can be weaker in remote mountain areas.
Indonesia
Recommended · Airalo or Jetpac
Excellent in Bali, Lombok, Jakarta and Yogyakarta. Coverage becomes more limited on remote islands.
Japan
Recommended · Holafly (Unlimited) or Airalo
Fast and reliable nationwide. Ideal for Google Maps and train apps.
South Korea
Recommended · Airalo
Excellent nationwide speeds. Works well across Seoul, Busan and Jeju.
Singapore
Recommended · Any major provider
Almost every provider performs well. Very fast mobile network throughout the city-state.
Malaysia
Recommended · Airalo
Reliable throughout Kuala Lumpur, Penang and Langkawi. Airalo is usually the best value.
Philippines
Recommended · Airalo
Coverage depends on the island. Best around Manila, Cebu, Boracay and Palawan. Expect slower speeds in remote areas.
Cambodia
Recommended · Airalo
Airalo works well. Coverage strongest around Phnom Penh, Siem Reap and Kampot.
Laos
Recommended · Airalo
Good for major tourist routes. Signal weaker in mountainous regions.
Sri Lanka
Recommended · Airalo
Reliable around Colombo, Kandy, Ella and Mirissa. Excellent for most travellers.
India
Recommended · Airalo or local SIM
Coverage is generally good in cities. Some travellers may prefer a local SIM if staying several weeks due to lower costs.
Choosing a plan
Regional Asia eSIM vs single country eSIM
Regional Asia eSIM
Best if you're visiting multiple countries.
- One purchase covers the trip
- No swapping plans at every border
- Convenient for backpackers
Perfect for
Southeast Asia trips · multi-country holidays · long-term travel
Single country eSIM
Best if you're staying in one destination.
- Often cheaper per GB
- More data included
- Better local network options
Perfect for
Two-week holidays · digital nomads · long stays
Timing
When should you buy?
Before you fly
- • Buy your eSIM.
- • Install it in your phone's settings.
- • Keep it switched off until you land.
After landing
- • Turn on your eSIM.
- • Enable roaming for the eSIM only.
- • Data should connect within a few minutes.
Stretch your data
Tips for saving mobile data
- Download Google Maps offline
- Download language packs
- Use hotel Wi-Fi when available
- Turn off background app refresh
- Upload photos when connected to Wi-Fi
- Stream videos over Wi-Fi where possible
Our verdict
What we recommend
Best overall
Airalo
The best combination of price, reliability, coverage and ease of use — ideal for most travellers visiting Asia.
Best unlimited data
Holafly
Perfect for heavy users who stream, work remotely or rely on constant internet access.
Best for multi-country
Jetpac or Airalo Regional
Ideal for backpackers travelling across several countries on one trip.
Common questions
Frequently asked
Can I keep my UK phone number?+
Yes. Your physical SIM can stay in your phone while using an eSIM for mobile data — your normal number keeps receiving texts and calls.
Can I still use WhatsApp?+
Yes. Your WhatsApp account stays exactly the same and works over the eSIM's mobile data.
Can I make phone calls?+
Most travel eSIMs are data only. Use WhatsApp, FaceTime, Messenger or Skype for voice and video calls instead.
Do eSIMs work everywhere?+
Coverage is excellent in cities and tourist areas but can become weaker in remote mountains, islands and national parks.
Is an eSIM better than buying a local SIM?+
For most travellers, yes — it's quicker, easier and avoids searching for SIM card shops after arriving. Local SIMs can offer better value for very long stays.
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