Real phone screenshots for every step, from scanning the QR code to the settings you change on arrival. There is a complete version in English, 繁體中文, 한국어 and 日本語 — pick whichever you read most comfortably.
This page is the quick summary. If you want to follow along step by step, go straight to an illustrated guide above, or browse the full eSIM installation category.
For most plans, install the day before or the morning of departure, while you still have Wi-Fi. Then you only need to switch on roaming when you land. Some plans start counting days at installation, so installing weeks early is not an advantage.
Exception: some Thailand plans can only be installed after you arrive. In that case connect to the airport's free Wi-Fi first — see our Thailand arrival guide. Your product page and order email state which rule applies.
Screenshots for every step: eSIM installation guide.
Menu names vary by manufacturer, but the path is the same: Settings → Network & internet → SIMs → Add → Download a SIM instead → scan the QR code. Afterwards, open that SIM's settings, turn on Roaming, and set it as the mobile data line.
On Samsung it is Settings → Connections → SIM manager → Add eSIM. On Google Pixel it is Settings → Network & internet → SIMs → Download SIM.
Every screen from scanning the code to the settings you change on arrival.
Check your handset in about ten seconds before you buy.
Trip length and usage in, a figure with headroom out.
How it compares with a local SIM, roaming and pocket WiFi.
Last updated: 2026-08-02
The common reasons a QR code is rejected, and what to do about each one.
Settings paths differ a lot by brand — this one is organised that way.
Roaming, default data line and APN. Get these wrong and you land offline.
Worth reading before you buy rather than after.
How to read the fair-use threshold, and when you will actually notice it.
Five reasons the bill comes back higher than expected, and how eSIM differs.
What the airport counter actually costs you in money and in queue time.