Regional eSIM for Asia: One Plan Across 18 Countries

A regional eSIM is not simply a cheaper eSIM. It is a different product with a different job: it keeps one data profile working as you move between countries, so you are not reinstalling and reconfiguring at every border. That matters on some trips and is irrelevant on others. This guide sets out which countries the Asia regional plan actually covers, which networks it rides on, and the cases where buying a local plan per country still wins.

Which countries does a regional Asia eSIM cover?

The plans in our catalogue cover 18 countries and territories: Bangladesh, Cambodia, China, Hong Kong, India, Indonesia, Japan, Laos, Macao, Malaysia, Pakistan, the Philippines, Singapore, South Korea, Sri Lanka, Taiwan, Thailand and Vietnam. One profile, installed once, stays valid across all of them with no swapping at borders.

Two absences are worth flagging before you buy. Nepal, Myanmar, Mongolia and the Central Asian republics are not on that list, so a Kathmandu or Ulaanbaatar leg will leave you offline. China is included, which is less common than you might expect, and the connection routes through Chinese networks under a roaming agreement.

When does a regional eSIM beat buying a local plan per country?

The regional plan wins when you cross three or more borders, when individual stops are short, or when your route may change. The real saving is not the price per gigabyte — local plans are usually cheaper per gigabyte — but the leftover data, the dead time at each arrival, and the plans you buy and barely use.

Think of it as a threshold rather than a rule. A five-week trip through Thailand, Laos, Vietnam, Cambodia and Malaysia means five purchases, five installations and five allowances that each expire unused. One regional plan with a 30-day window covers the lot and carries whatever you did not use in Laos forward into Vietnam.

It also wins when the itinerary is provisional. If you are travelling on a rough plan and may add Taiwan or skip Sri Lanka, a regional profile absorbs the change without another purchase.

When should I buy a local plan instead?

Buy local when you are spending the whole trip in one country, when you need a lot of data, or when the destination has a dense local market. A single-country plan for Indonesia starts from around €3.99 for 1 GB over 7 days, where the regional equivalent starts from around €4.49 for the same shape of allowance.

The gap widens at volume. Local catalogues in Thailand, Japan, Malaysia and Indonesia carry heavy-data and unlimited options priced for the domestic market; the regional plan has to price for the most expensive network in its footprint. If you are staying put for two weeks and expect to use 20 GB, the single-country plan is the better instrument.

A workable compromise on long trips is to run the regional plan as the default and add a local plan for the one country where you stay longest.

Which mobile networks does the Asia eSIM connect to?

It roams onto established national carriers in each country, including Softbank and KDDI in Japan, SKT and LG U+ in South Korea, AIS, dtac and True in Thailand, Singtel and StarHub in Singapore, Telkomsel in Indonesia, Globe and Smart in the Philippines, Maxis, Digi and Celcom in Malaysia, and Chunghwa in Taiwan.

That mix matters because it is mostly 5G in East and Southeast Asia and mostly LTE in South Asia. In Bangladesh, Pakistan, India, Laos and Vietnam the plan attaches to 4G networks, which is perfectly serviceable for maps and messaging but slower than what you will see in Seoul or Singapore.

What do regional Asia eSIM plans cost?

The Asia catalogue holds 22 plans. Prices start from around €1.99 for 500 MB over 3 days, from around €4.49 for 1 GB over 7 days, and from around €11.99 for 3 GB over 30 days. Unlimited options begin from around €10.49 for a 3-day window, running up to 30 days.

Treat all of these as indicative. The table rendered on this page is generated from current stock, so the figure shown there is the one that applies today. At the long end the catalogue goes to 100 GB over 180 days, which is aimed at people spending half a year moving around the region rather than at holidaymakers.

How much data does a multi-country trip in Asia actually use?

Budget 0.6 to 0.8 GB per day. That is the usual range for maps, transport apps, translation, messaging and photo uploads, and it puts a two-week, three-country trip somewhere between 8 and 11 GB. Travel days run higher than static days because you navigate constantly in places you do not know.

Two things push the figure up in Asia specifically. Translation apps that process images use noticeably more than text translation, and ride-hailing apps — Grab, Gojek and their equivalents — keep location services and maps running whenever you are in transit. Hotel Wi-Fi is widely available and absorbs most of the heavy use, so plan around daytime consumption.

Does the plan keep working when I cross a border?

Yes, with a short pause. When you land in a new covered country the phone drops the previous network and searches for a partner carrier, which usually takes a few minutes and sometimes needs a flight-mode cycle to settle. The allowance and the validity window carry across unchanged.

Nothing needs reinstalling and no settings change. If the connection has not returned after ten minutes, toggle flight mode, and if that fails, select the network manually in your phone's carrier settings rather than leaving it on automatic.

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