One eSIM for the whole continent. From the beaches of Bali to the streets of Tokyo.
The best eSIM for Asia is one that works instantly, avoids roaming fees, and doesn’t require local SIM registration. Ovosim connects you immediately on arrival with reliable 5G coverage.
Asia eSIM Configuration
Instant delivery
⭐ 4.8/5 · 1,200+ verified travelers.
3GB/Day
5GB/Day
2GB/Day
Why smart travelers switch to Ovosim for Asia.
| Feature | OVOSIM | Airalo | Your Carrier Roaming |
|---|---|---|---|
| Cost (Standard Plan) | From €4.49 | €8.99 | $10/day+ |
| Network Speed | 5G / 4G+ Priority | Throttled | Varies |
| Setup | Instant QR | Manual | Automatic |
| Works with foreign cards | Yes | Limited | No |
| Available at airport | Before arrival | Sometimes | No |
Last updated:
No surprises at the airport. Activate instantly on arrival.
Chat with actual humans if something goes wrong.
No hidden fees. No roaming charges. Period.
Ready in 3 simple steps.
Go to Settings > Cellular > Add eSIM and scan the QR code from our website
Name it 'Travel Data'. Set it to 'Secondary' so your main number still works.
When you land, turn on 'Data Roaming' for the eSIM line only.
The classic Southeast Asia backpacker circuit — Bangkok to Chiang Mai to Luang Prabang to Hanoi to Ho Chi Minh City to Siem Reap to Bali — crosses seven countries, seven different SIM card markets, and seven different sets of registration requirements. Buying a new plastic SIM at every border crossing means airport kiosk queues, passport registration, language barriers, and a growing collection of SIM cards you'll never use again. Ovosim installs once before you fly and works across the entire continent. Automatic network switching connects you to the strongest available carrier in each country — AIS and DTAC in Thailand, Viettel in Vietnam, Smart in Cambodia, Telkomsel in Indonesia, Singtel in Singapore, and premium partners throughout.
China blocks Google, Instagram, WhatsApp, Facebook, YouTube, and most Western apps and websites behind the Great Firewall. This applies to all networks inside China — including international eSIMs. You need a VPN installed and tested before you enter China, not after landing. Once inside China, VPN app downloads are blocked from the Chinese App Store region. Ovosim's Asia eSIM routing through international partners gives you better VPN compatibility than local Chinese SIMs, but a VPN is still required for restricted apps. ExpressVPN and Astrill are the most consistently reliable in China in 2026 — install and test at home before flying. For the complete China connectivity guide see our China eSIM page.
Bangkok — Sukhumvit, Silom, Khao San Road, and the historic Rattanakosin area all have excellent 4G/5G. Suvarnabhumi (BKK) and Don Mueang (DMK) airports both have full coverage. The BTS Skytrain and MRT Metro have signal throughout. Chiang Mai — Nimman Road, the Old City, and Night Bazaar area all well covered. Phuket — Patong, Kata, Karon, and Old Town Phuket all have strong 4G/5G. Boat crossings to Phi Phi Islands and Koh Lanta have intermittent signal on open water. Koh Samui — covered throughout the island. Koh Tao and Koh Phangan — main towns covered, remote beaches and dive sites have limited signal. Download offline maps before any island-hopping.
Hanoi — Old Quarter, Hoan Kiem Lake, and the French Quarter all have excellent Viettel 4G. Noi Bai International Airport (HAN) covered. Ho Chi Minh City (Saigon) — District 1, Bui Vien Walking Street, and Ben Thanh Market area all well covered. Tan Son Nhat Airport (SGN) has full coverage. Ha Long Bay — Halong City has 4G, signal on the bay itself varies by cruise route and weather — most cruise boats have WiFi but download offline entertainment as backup. Hoi An — Ancient Town and An Bang Beach both covered. Da Nang — city and beach areas have strong 4G. Hue — Imperial City and town center covered. The train journey on the Reunification Express (Hanoi to Ho Chi Minh City) has coverage through coastal and urban sections with gaps through mountain tunnels.
Siem Reap — Pub Street, the Old Market, and the main tourist area have solid Smart 4G. Siem Reap International Airport (REP) covered. Angkor Wat complex — the main temples including Angkor Wat, Bayon, and Ta Prohm all have 4G signal at entrance areas and main viewing spots. Remote outer temples of the complex have intermittent signal. Download offline maps of the Angkor Archaeological Park before visiting — the complex is enormous and easy to get disoriented in. Phnom Penh — city center, Riverside, and BKK1 area all have solid 4G. Sihanoukville and the Southern Islands — Koh Rong and Koh Rong Samloem have limited signal in main beach areas.
Bali — Seminyak, Canggu, Ubud, Kuta, and Uluwatu all have strong Telkomsel 4G/5G. Ngurah Rai International Airport (DPS) has full coverage. Ubud — center has good signal, rice terrace walks and jungle areas have intermittent coverage. Mount Batur — signal at the crater rim viewpoints, dead zones on the ascent trail. Gili Islands (Gili Trawangan, Gili Air, Gili Meno) — limited 3G/4G, download offline maps and entertainment before the boat crossing. Komodo National Park — Labuan Bajo town has 4G, Komodo Island itself has minimal signal. Jakarta — city center and main business districts have excellent Telkomsel 5G. Lombok — Senggigi and Kuta Lombok have 4G, rural areas limited.
Singapore is where most Asia itineraries begin or transit through — and it has some of the fastest mobile data speeds in the world. Singtel 5G covers the entire island including Changi Airport (all terminals including Jewel), the MRT underground system, Orchard Road, Marina Bay Sands, Sentosa Island, and all major attractions. Singapore is an ideal place to stock up on offline downloads, update apps, and test your VPN before continuing to countries with restrictions.
Japan — see our dedicated Tokyo eSIM page for full coverage details including Shinkansen connectivity, Suica card setup, and Google Translate tips. South Korea — Seoul has some of the world's fastest 5G speeds. Incheon International Airport (ICN) is one of the world's best-connected airports. The Seoul Metro has full underground 5G throughout. Jeju Island, Busan, and all major Korean cities are covered with excellent 4G/5G.
Download before flying: Google Maps with offline maps for every country — non-negotiable across Asia. Maps.me as offline backup particularly for rural Southeast Asia. Grab — the dominant ride-hailing app across Southeast Asia covering Thailand, Vietnam, Cambodia, Malaysia, Singapore, Indonesia, and the Philippines. Gojek — Indonesia's super-app for rides, food delivery, and payments. Google Translate with offline language packs for Thai, Vietnamese, Japanese, Korean, and Mandarin. ExpressVPN or Astrill — install and test before entering China. XE Currency for tracking THB, VND, KHR, IDR, JPY, KRW simultaneously. Agoda — dominant hotel booking platform in Asia, often cheaper than Booking.com for regional properties. Klook for activities, attraction tickets, and train bookings across Asia.
Scan the QR code and connect immediately.
Share data with your laptop.
Keep your original number for calls.
OVOSIM offers the best value eSIM for Asia starting at €4.49. It connects to Premium Tier-1 Networks for 5G speed.
Plans start from €4.49 for 1GB. There are no hidden fees or roaming charges.
Yes, the eSIM activates instantly upon arrival. You will have 5G data immediately.
The Ovosim Asia plan covers Thailand, Vietnam, Cambodia, Indonesia, Singapore, Malaysia, Philippines, Japan, South Korea, China, India, Sri Lanka, Nepal, and more — the full Southeast and East Asia travel circuit on one eSIM with automatic network switching in each country.
Yes — the Ovosim Asia plan covers the full Banana Pancake Trail and beyond on one QR code. Install once before flying and switch countries seamlessly without buying new SIMs at each border. Automatic network switching connects you to the strongest carrier in each country.
The eSIM works for data connectivity in China. However, apps like Google, Instagram, WhatsApp, and YouTube are blocked by the Great Firewall and require a VPN to access — this applies to all networks including international eSIMs. Install ExpressVPN or Astrill before flying to China and test at home. VPN apps cannot be downloaded once inside China.
Yes — the main Angkor Wat, Bayon, and Ta Prohm temples have Smart 4G at entrance areas and main viewing spots. Remote outer temples of the complex have intermittent signal. Download offline maps of the Angkor Archaeological Park before visiting as the complex is enormous.
Yes — Telkomsel covers Seminyak, Canggu, Ubud, Kuta, and Uluwatu with strong 4G/5G. Ubud jungle areas and rice terrace walks have intermittent signal. Gili Islands have limited 3G/4G — download offline maps before the boat crossing.
Koh Samui is covered throughout. Koh Tao and Koh Phangan have coverage in main towns with limited signal on remote beaches and dive sites. Phi Phi Islands and open water crossings have intermittent signal — download offline maps and entertainment before island-hopping.
No VPN is needed for Thailand, Vietnam, Cambodia, Indonesia, Bali, Singapore, or most of Southeast Asia — all major apps including Google, WhatsApp, and Instagram work without restriction. A VPN is required only for China. Install and test before flying to China specifically.
Yes — Singtel 5G covers all Changi Airport terminals including Jewel Changi. Singapore has some of the fastest mobile data speeds in the world. It's the ideal place to download offline maps, update apps, and test your VPN before continuing to China or other destinations.
Yes for multi-country trips. Buying local SIMs at Bangkok, Hanoi, Siem Reap, and Bali airports involves queuing, passport registration, and discarding SIM cards at each border. Ovosim installs once and handles the entire region automatically — particularly valuable for routes crossing 4 or more countries.
For a 30-day Southeast Asia trip: 5GB covers basic navigation and messaging if you use hostel WiFi regularly. 10GB is comfortable for constant Google Maps, Grab, and social media without relying on WiFi. Unlimited is ideal for digital nomads or anyone doing remote work, video calls, or uploading content daily.
