An international eSIM is a prepaid data plan you download to your phone before a trip, so you are online as soon as you land abroad. Instead of paying your home carrier's roaming rates or hunting for a SIM shop at the airport, you connect to a local network at local prices.
This guide explains how international eSIMs work, the difference between country and regional plans, how to pick the right one for your route, and how to get set up in a few minutes.
In this guide:
- How an international eSIM works
- Country vs. regional eSIMs
- egoViet regional plans
- Which plan fits your trip?
- How to set up an international eSIM
- FAQs
How an International eSIM Works
An eSIM is a SIM chip built into your phone that can store mobile plans digitally. Here is a full explainer on what an eSIM is. An international eSIM is simply a plan you add to that chip for a trip abroad.
Behind the scenes, the eSIM provider works with mobile operators in each destination. When you land, your phone connects to one of those partner networks, just like a local customer would. Because you pay up front for a set amount of data and a set number of days, there are no roaming surprises on your next bill.
A few things make international eSIMs different from roaming with your home carrier:
- Prepaid: You pay once, before you go. Nothing is billed later.
- Local networks: You use partner networks in each country, usually with 4G or 5G speeds.
- Your number stays: Your home SIM stays in the phone for calls and texts, while the eSIM handles data.
Country vs. Regional eSIMs
| Country eSIM | Regional eSIM | |
|---|---|---|
| Coverage | One country | Several countries in one region |
| Best for | A trip to a single destination | Multi-country routes and border crossings |
| Price | Usually the cheapest per GB | A little more, but one plan covers the whole route |
| Example | Japan eSIM for two weeks in Tokyo and Kyoto | Europe eSIM for Paris, Rome, and Barcelona |
The rule of thumb: if you spend your whole trip in one country, a country eSIM is the best value. As soon as you cross a border, a regional plan saves you from buying and installing a new eSIM in every country.
egoViet Regional eSIM Plans
egoViet has country plans for more than 150 destinations, plus these regional plans:
| Plan | Countries covered | Good for |
|---|---|---|
| Europe eSIM | 33, including France, Germany, Italy, Spain, the UK, Switzerland, and Turkey | Rail trips and city breaks across the EU and UK |
| EU + Middle East and North Africa eSIM | 50+, adding countries such as the UAE, Egypt, Morocco, Jordan, and Israel | Trips combining Europe with the Middle East or North Africa |
| Asia eSIM | 14 on daily plans, 19 on fixed plans, including Japan, South Korea, Thailand, Vietnam, and Singapore | Longer Asia routes, such as Japan plus Southeast Asia |
| Southeast Asia eSIM | 5: Vietnam, Thailand, Malaysia, Singapore, and Indonesia | The classic backpacker loop |
| South America eSIM | 12, including Brazil, Argentina, Chile, Peru, and Colombia | Overland trips across Latin America |
Coverage can differ between plan types within the same region, so always check the full country list on the product page before you buy.
Which International eSIM Fits Your Trip?
- One country, any length: Pick that country's eSIM. Example: a Thailand eSIM for a beach holiday.
- Two countries: Compare two country plans with one regional plan. Two country eSIMs are sometimes cheaper, but you have to set up two of them.
- Three or more countries in one region: A regional eSIM almost always wins on convenience.
- Heavy data users: Look at daily plans or unlimited options, which are available for many single countries.
Not sure how much data to buy? Light users get by on 1–3 GB per week, while most travelers who use maps, social media, and the odd video call need 5–10 GB per week. Here is a full guide to how much data you need when you travel.
How to Set Up an International eSIM
- Check your phone. It must support eSIM and be carrier-unlocked. See our list of eSIM-compatible devices.
- Buy your plan from the egoViet eSIM store. Your QR code arrives by email.
- Install it at home on Wi-Fi by scanning the QR code. Our installation guide covers iPhone and Android.
- Switch on the eSIM when you land, set it as your mobile data line, and turn on data roaming for that line. On most plans, the validity period starts when it first connects at your destination.
- Keep your home SIM for calls and texts, with data roaming switched off. Here is how to use both lines together.
Good to know: egoViet plans can't be topped up, so choose one that covers your whole trip with a day to spare. If you use up your high-speed data, you stay online at a basic speed (around 128 kbps), which is enough for messaging.
FAQs: International eSIMs
How does an international eSIM work?
You buy a prepaid data plan online, install it by scanning a QR code, and your phone connects to a partner network when you arrive. You pay once up front, so there are no roaming charges afterward.
Is a regional eSIM better than a country eSIM?
Only if you visit several countries. For a single destination, a country eSIM is usually cheaper. For multi-country trips, a regional eSIM saves you buying and installing a new plan at each border.
Can I keep my phone number with an international eSIM?
Yes. Your home SIM stays in your phone, so you can still receive calls and texts on your usual number while the eSIM provides data.
When should I install my international eSIM?
Before you travel, on a stable Wi-Fi connection. On most egoViet plans, the validity period starts when your phone connects to a network at your destination. The plan details show the validity policy for your plan.