eSIMガイド
eSIMのインストールから設定、日々の使い方まで。
eSIM basics
3 guidesWhat is an eSIM (esim), exactly?
The difference between eSIM and a physical SIM, and why travelers use them abroad.
eSIM vs roaming vs pocket Wi-Fi: cost & convenience
A cost and convenience comparison to help you compare for your own trip.
eSIM pros and cons: do you actually need one?
When an eSIM is worth it, and when a physical SIM or roaming still wins.
Register, install & use
6 guidesHow to register & install an eSIM (step by step)
The three ways to install an eSIM (link, QR code, manual entry), the setup flow that works across providers, and the errors people hit most.
iPhone eSIM setup and data settings
Install steps and travel-data settings on iPhone.
Galaxy / Android eSIM setup, by brand
Samsung, Pixel and other Android eSIM menus differ: here is each one.
How to use your eSIM after you land
Setting the data line, turning on roaming, and switching networks.
Keep your home number while using a travel eSIM (dual SIM)
How to keep getting verification texts on your home number while data runs on a travel eSIM.
When should you install your eSIM? Install vs. activation
When to install vs. when to activate, so you don't waste your validity period.
Check your phone
2 guidesChoosing a plan
5 guidesHow much eSIM data do you actually need?
A rule of thumb by trip length and habits: maps vs streaming.
How "unlimited" eSIM plans work: FUP explained
Many "unlimited" plans limit speed after a threshold. How to check the conditions.
How to pick an eSIM that allows tethering / hotspot
Why some plans quietly block hotspot, and how to check first.
How to check which local carrier an eSIM uses
The operator you actually connect to changes real-world speed.
Ran out of data abroad? Top-up vs. buying a new eSIM
Whether you can top up the same eSIM or need to rebuy when your data runs out.
By destination
5 guidesHow to choose an eSIM for Japan
How to pick by data, network and usage conditions in Japan.
How to choose an eSIM for Vietnam & Thailand (SEA)
Regional vs single-country plans for hopping around Southeast Asia.
How to choose an eSIM for Taiwan
Comparing data vs unlimited plans, and how to check coverage.
Best eSIM for Europe (multi-country)
How regional Europe plans handle border-crossing, and where single-country wins.
How to choose an eSIM for the USA
How to pick by network and where you travel: cities vs road trips.
Providers & buying
2 guidesTroubleshooting
6 guideseSIM not working? Fixes by symptom
The most common install and activation failures, and how to fix each.
eSIM installed but no data / no internet
Signal shows but nothing loads: data roaming and APN checks.
QR code won’t scan / "already used" error
When to rescan, manual install, and when to ask for a reissue.
Landed but eSIM won’t activate
Manual network selection and activation-timing gotchas.
eSIM too slow? FUP and network checks
Whether you hit a daily cap, or you’re on a weaker local network.
Accidentally deleted your eSIM? Reinstall and reissue policies
Whether a deleted eSIM can be reinstalled, and how to avoid losing it.