Countries covered by a Asia eSIM
The regional Asia plan we use covers 15 countries from East Asia through South Asia to the Indian Ocean islands. That means you install one profile before leaving, and your data works the moment you cross into any covered territory.
Major destinations include China, Japan, South Korea, India, Taiwan, and Hong Kong. The plan also covers Bangladesh, Sri Lanka, Nepal, Maldives, Macao, Pakistan, Mongolia, Bhutan, and Afghanistan.
Regional plan vs single-country plan
A regional eSIM makes sense when you cross borders. If you're hopping between Tokyo, Seoul, and Taipei, one profile handles all three stops. On the other hand, spending two weeks solely in Japan often means a single-country plan offers better value per gigabyte.
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Multi-country itinerary
Visiting two or more countries in the coverage list? Regional data removes the need to buy and switch profiles at each border.
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Single destination
Staying in one country for the whole trip usually means a dedicated plan delivers more data for the same outlay. Check both options.
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Cross-border travel
Train from Hong Kong to Shenzhen, bus from Kathmandu to Lhasa, ferry between South Korean islands - regional coverage handles brief excursions without manual switching.
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Cost comparison
Regional plans cost noticeably more per GB than single-country options, but you pay once and forget it. Weigh total data needs against convenience.
Networks and coverage across Asia
The provider partners with major mobile operators in each country. Network quality varies: tier-one infrastructure in Japan and South Korea, reliable but slower speeds in parts of Nepal and Mongolia. Rural areas, mountain passes, and remote islands often rely on 3G or have no signal at all.
| Country | Typical networks | Coverage notes |
|---|---|---|
| China | China Mobile, China Unicom | Strong in cities, patchy in western provinces; VPN required for many services |
| Japan | NTT Docomo, SoftBank | Excellent nationwide, including Shinkansen lines and regional islands |
| South Korea | SK Telecom, KT | Dense 4G/5G coverage, underground metro stations well served |
| India | Airtel, Vodafone Idea | Urban and major tourist circuits solid; rural Himalayan areas unreliable |
| Taiwan | Chunghwa Telecom, FarEasTone | Reliable across the island, mountain national parks have gaps |
| Hong Kong | CSL, SmarTone | Ubiquitous signal, metro and tunnels included |
| Nepal | Ncell, Nepal Telecom | Kathmandu valley and Pokhara good; trekking routes above 3000m intermittent |
| Maldives | Dhiraagu, Ooredoo | Resort islands usually covered, local islands variable, boats have no signal |
Before heading into remote areas, download offline maps and any travel documents. Expect signal to drop on long-distance trains between major hubs, especially in Mongolia and across the Tibetan plateau.
Data volumes for a multi-country trip
How much data you need depends on trip length and habits. Navigation apps consume around 5 MB per hour. Video calls and social media uploads add up quickly, while browsing and messaging stay light.
| Trip type | Duration | Suggested data |
|---|---|---|
| City break | 3-5 days | 1-2 GB (maps, messaging, restaurant lookups) |
| Two-country tour | 7-10 days | 3-5 GB (moderate photo uploads, daily video calls) |
| Multi-city circuit | 2 weeks | 5-8 GB (frequent social posts, streaming music) |
| Extended backpacking | 3-4 weeks | 10 GB+ (work emails, video streaming on rest days) |
Most plans allow top-ups if you run low. Check the plan page for fair-use policies on hotspot and any speed restrictions after a certain threshold.
Practical notes
Install the eSIM profile over Wi-Fi before you fly. Your phone needs to be carrier-unlocked and eSIM-compatible - check the compatibility list if you're unsure. Once installed, leave the profile switched off until you land; turning it on at home may start the plan validity clock.
At your destination, enable data roaming for the eSIM line only. Your primary SIM stays active for calls and texts to your home number, but all data routes through the eSIM. If you cross into a new country covered by the regional plan, the phone usually picks up the local network automatically within a few minutes.
China blocks many services without a VPN. Install and test your VPN at home before departure; trying to download one after arrival is difficult. In Afghanistan and Pakistan, network reliability varies by region and security situation - local advice is essential.
Ferries between islands in the Maldives, trains through the Indian Himalayas, and buses crossing mountain passes in Nepal often mean hours without signal. Download offline content beforehand. Remote monasteries in Bhutan and ger camps in Mongolia rarely have mobile coverage.
If you hit problems, the troubleshooting guide covers common fixes: toggling airplane mode, selecting the network manually, or reinstalling the profile. The provider's app usually shows remaining data and lets you top up or extend validity. For a deeper look at how the technology works, see how eSIM works.
Can I use the same Asia eSIM plan if I fly into Tokyo and then travel overland to South Korea and China?
Yes. The regional plan covers all three countries, so you install it once and your data works across all stops. The phone switches networks automatically when you cross borders.
Does the Asia eSIM include phone calls or just mobile data?
It's data-only. Your home SIM stays active for calls and texts to your usual number. Use WhatsApp, Telegram, or similar apps over the eSIM data connection for voice and video calls.
When does the validity period start - when I buy the plan or when I arrive in Asia?
The plan validity starts when your phone first connects to a network in one of the covered countries. Install the profile at home but keep it switched off until you land, then turn it on and enable data roaming for that line.
Will I have mobile internet on the train from Kathmandu to the Tibet border or on ferries between Maldivian islands?
Expect intermittent or no signal. Mountain routes in Nepal and open water in the Maldives often lack coverage. Download maps and any needed documents before the journey.
Do I need a separate eSIM if I'm only visiting Japan for two weeks, or should I still get the regional Asia plan?
For a single-country stay, a Japan-specific eSIM usually offers better value per gigabyte. Regional plans make sense when you cross borders; if you're not leaving Japan, check the dedicated country plan instead.