Quick verdict by trip type
For most Asia trips, the value pick is the Flysimio Asia eSIM — a fixed-data plan covering the countries you actually need, at a fraction of the cost of an unlimited regional bundle. Match your trip to the table below.
| Trip type | Best pick | Why |
|---|---|---|
| Southeast Asia loop (Thailand, Vietnam, Philippines, Indonesia, Malaysia) | Flysimio Asia 7-country 10 GB | Covers the classic SE Asia backpacker route at the lowest price per GB |
| Japan + South Korea only | Flysimio Japan or South Korea country plan | Single- or dual-country trips are cheaper on a country-specific eSIM than a 20-country bundle |
| Grand Asia tour (Japan, Korea, Hong Kong, India, Singapore) | Flysimio Asia 20-country 10–20 GB | The broader bundle adds East Asia, South Asia, and Oceania to one line |
| Digital nomad based in one Asian hub for a month+ | Flysimio Asia 7-country 20 GB or 50 GB/180 days | Long validity and larger caps suit an extended stay without re-buying |
| Heavy streamer, unsure of data needs | Airalo Asia unlimited (18 countries) | Unlimited removes the guesswork, at a materially higher price per day |
Flysimio Asia eSIM
$4.50 from · instant QR · 7-day refund
Asia eSIM price index — August 2026
Read the country count on every row: Asia bundles are not the same product. We sell a 7-country South-East Asia bundle and a broader Asia-Pacific one; Airalo's Asialink covers 18 countries, Holafly's 16 and Nomad's APAC 14. A cheaper bundle may simply be a smaller one.
Across 4 providers and 15 plans compared in August 2026, the cheapest Asia eSIM data on a standard 3–50 GB plan works out at $2.25/GB (Flysimio, priced live). On the same measure the cheapest rival plan is Nomad at $1.02/GB — cheaper than our best equivalent plan, which costs 121% more per gigabyte.
| Provider | Plan | Price | Price per GB | Network | Best for | Price checked |
|---|---|---|---|---|---|---|
| Nomad | 50 GB / 45 daysAPAC · 14 countries | $51.00 | $1.02/GB | Local partners | Easy app | Aug 15, 2026 |
| Nomad | 20 GB / 45 daysAPAC · 14 countries | $35.00 | $1.75/GB | Local partners | Easy app | Aug 15, 2026 |
| Nomad | 10 GB / 30 daysAPAC · 14 countries | $21.00 | $2.10/GB | Local partners | Easy app | Aug 15, 2026 |
| Flysimio | 50 GB / 180 days7 countries | $112.50 | $2.25/GB | Local partners | Live | |
| Flysimio | 20 GB / 30 days7 countries | $50.00 | $2.50/GB | Local partners | Live | |
| Nomad | 5 GB / 30 daysAPAC · 14 countries | $14.00 | $2.80/GB | Local partners | Easy app | Aug 15, 2026 |
| Flysimio | 10 GB / 30 days7 countries | $30.50 | $3.05/GB | Local partners | Live | |
| Flysimio | 5 GB / 30 days7 countries | $17.50 | $3.50/GB | Local partners | Live | |
| Flysimio | 3 GB / 15 days7 countries | $11.50 | $3.83/GB | Local partners | Live | |
| Nomad | 1 GB / 7 daysAPAC · 14 countries | $4.00 | $4.00/GB | Local partners | Easy app | Aug 15, 2026 |
| Flysimio | 1 GB / 7 days7 countries | $4.50 | $4.50/GB | Local partners | Live | |
| Airalo | Unlimited (3 GB/day) / 7 daysAsialink Unlimited · 18 countries | $26.00 | — | Local partners | Coverage & app | Aug 15, 2026 |
| Holafly | Unlimited / 7 days16 countries | $27.50 | — | Local partners | Unlimited data | Aug 15, 2026 |
| Airalo | Unlimited (3 GB/day) / 30 daysAsialink Unlimited · 18 countries | $73.50 | — | Local partners | Coverage & app | Aug 15, 2026 |
| Holafly | Unlimited / 30 days16 countries | $73.90 | — | Local partners | Unlimited data | Aug 15, 2026 |
- Airalo · Unlimited (3 GB/day) / 7 days: Airalo bills this as "Unlimited": 3 GB per day at full speed, then throttled to about 1 Mbps.
- Holafly · Unlimited / 7 days: Unlimited with no daily high-speed cap; Holafly applies a fair-use policy for at most one day at a time.
- Airalo · Unlimited (3 GB/day) / 30 days: Airalo bills this as "Unlimited": 3 GB per day at full speed, then throttled to about 1 Mbps.
- Holafly · Unlimited / 30 days: Unlimited with no daily high-speed cap; Holafly applies a fair-use policy for at most one day at a time.
How this table is priced. Flysimio prices are read live from our carrier catalog every time this page loads, so the figure here is the figure at checkout. Competitor prices are the US-dollar price shown on each provider's own site, read on the date in the last column and linked to the page we read it from; promotional prices are marked alongside the list price. Price per GB is the plan price divided by its included data — unlimited passes have no per-GB figure and are ranked by total price instead. Full method: how we test, the eSIM Price Index and what an eSIM costs.
- Nomad — checked Aug 15, 2026 — www.nomadesim.com/apac-eSIM
- Airalo — checked Aug 15, 2026 — www.airalo.com/asia-esim
- Holafly — checked Aug 15, 2026 — esim.holafly.com/esim-asia/
Which Asian countries are actually covered?
The 7-country Southeast Asia bundle covers Thailand, Singapore, Vietnam, the Philippines, Indonesia, Malaysia, and Cambodia. The 20-country Asia-Pacific bundle adds Japan, South Korea, Hong Kong, Macau, Taiwan, India, China, Kazakhstan, Uzbekistan, Bangladesh, Laos, Pakistan, Sri Lanka, and Kyrgyzstan. Neither includes mainland China for data-only travel SIMs from most providers, including this one, due to network restrictions — check the coverage list before you buy if China is on your route.
| Country / area | 7-country SE Asia | 20-country Asia-Pacific |
|---|---|---|
| Thailand, Vietnam, Philippines, Indonesia, Malaysia, Singapore, Cambodia | Yes | Yes |
| Japan, South Korea | No | Yes |
| Hong Kong, Macau, Taiwan | No | Yes |
| India, Sri Lanka, Bangladesh, Pakistan | No | Yes |
| China (mainland) | No | No |
How much data do you actually need for Asia?
| Usage type | Estimated data per day | For 14 days |
|---|---|---|
| Navigation only (Google Maps, Grab) | ~100 MB/day | ~1.4 GB |
| Navigation + social media (Instagram, TikTok) | ~300 MB/day | ~4.2 GB |
| Navigation + streaming music (Spotify) | ~400 MB/day | ~5.6 GB |
| Navigation + video streaming (YouTube, Netflix) | ~1 GB/day | ~14 GB |
| Remote work (video calls + browsing) | ~2 GB/day | ~28 GB |
For a typical two-week Southeast Asia loop: 10 GB is comfortable for most travelers. Download offline Google Maps regions and Spotify playlists on Wi-Fi before departure to stretch a smaller plan further.
Which Asian carriers your eSIM actually uses
- Thailand: AIS, DTAC, True Move H — strong 4G/5G in Bangkok, Phuket, and Chiang Mai; solid coverage on the islands.
- Vietnam: Viettel, Vinaphone, Mobifone — dense 4G in Hanoi, Ho Chi Minh City, and the coastal resort corridor.
- Singapore: Singtel, StarHub, M1 — island-wide 5G, among the best mobile networks anywhere.
- Japan: NTT Docomo, SoftBank, au — near-total 4G/5G coverage including the Shinkansen corridor.
- South Korea: SK Telecom, KT, LG U+ — some of the world's fastest 5G, full Seoul Metro coverage.
- Indonesia & Philippines: Telkomsel and Globe/Smart respectively — strong in cities and main tourist islands; remote islands vary.
Asia eSIM coverage by country
A single Flysimio Asia eSIM roams across the bundle on one line — no swapping at borders. Here is what to expect in the most-visited countries, with links to each country guide if you are only visiting one. City-hopping through Hong Kong? Our Hong Kong eSIM guide compares CSL- and SmarTone-routed plans.
- Japan — NTT Docomo, SoftBank, and au blanket Tokyo, Osaka, Kyoto, and the Shinkansen network. See the Japan country guide for a Japan-only plan.
- Thailand — AIS and True Move H cover Bangkok, Phuket, and Chiang Mai; islands like Koh Samui and Koh Tao have solid town-area 4G.
- Singapore — Singtel and StarHub deliver island-wide 5G, including full MTR-equivalent coverage on the MRT.
- Vietnam — Viettel leads with dense 4G from Hanoi to Ho Chi Minh City and the Da Nang coast.
- South Korea — SK Telecom and KT offer some of the fastest 5G in the world, with full Seoul subway coverage.
Frequently asked questions
What is the best eSIM for Asia in 2026?
It depends on your route. For Southeast Asia only (Thailand, Vietnam, Philippines, Indonesia, Malaysia, Singapore, Cambodia), Flysimio's 7-country bundle is the cheapest per GB we found. For a broader trip adding Japan, Korea, or India, the 20-country Asia-Pacific bundle covers more ground for a higher per-GB price. Airalo's Asialink (18 countries, unlimited) suits heavy streamers who don't want to track data.
Is a regional Asia eSIM cheaper than buying per country?
For a single-country trip, a dedicated country plan (Japan, Thailand, etc.) is usually cheaper. Once your itinerary spans three or more countries, the regional bundle saves you from re-buying and reinstalling at each border and is typically cheaper overall.
Does an Asia eSIM work in China?
No. Mainland China is excluded from Flysimio's Asia bundles (and most competitors') due to network restrictions on foreign data-only eSIMs. Hong Kong, Macau, and Taiwan are included in the 20-country bundle and operate on separate networks from mainland China.
How much data do I need for a two-week Southeast Asia trip?
For typical tourist use — maps, messaging, social media, and some photos — 10 GB over two weeks is comfortable for most travelers. Heavy streamers or remote workers should look at the 20 GB tier or a country-specific unlimited plan.
Is Airalo or Flysimio better for Asia?
If you'll use under 15–20 GB across your trip, Flysimio's fixed-data bundles cost meaningfully less than Airalo's unlimited Asialink plan. If you genuinely can't predict your usage or plan to stream heavily, Airalo's unlimited removes that risk at a higher flat price.
Does the Asia eSIM work on islands like Bali, Phuket, and Boracay?
Yes. Bali (Indonesia), Phuket (Thailand), and Boracay (Philippines) all have solid 4G in tourist areas and town centers under the regional bundle, on the same Telkomsel, AIS, and Globe/Smart networks as the country-specific plans.
Can I top up if I run out of data mid-trip?
Yes. Top up from your Flysimio account dashboard at any time — top-ups apply instantly without needing a new eSIM.
Do I need to activate before I fly?
No. You have six months from purchase to activate. The plan's validity period only starts counting down when your eSIM first connects to a network in the region.
Sources & further reading
Maya Okafor
Senior Travel Connectivity Editor
Maya has tested eSIMs across 40+ countries over five years of full-time travel — from Tokyo subways to Patagonian backroads. She runs Flysimio’s hands-on network and speed testing.