The basics
What is an eSIM? A guide for international travel
Understand the difference between an eSIM and a physical SIM, then check device compatibility, carrier locks and plan validity before you buy.
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GUIDES
Travel eSIM guides
Practical guides to choosing, setting up and using a travel eSIM, with references to official information.
All articles (9)
Setup
How to set up a travel eSIM on iPhone and Android
Prepare before departure, find the right settings on your phone and check your data line when you arrive. Follow the official instructions for your device and provider.
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Data allowance
How much mobile data do you need for a trip?
Estimate travel data from your usual usage, trip length and plans for maps, social media, video, tethering or work. Check limits and top-ups before buying.
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Before buying
How to check eSIM compatibility and carrier locks
Check your exact model, purchase region, carrier-lock status and the seller’s requirements before choosing a travel eSIM.
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Setup and use
Travel eSIM data roaming: check each line separately
Choose the right mobile data line and check roaming and automatic data switching separately for your home SIM and travel eSIM.
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Troubleshooting
Travel eSIM not working? Check these steps before deleting it
Separate installation problems, no service and missing data, then check plan conditions and prepare useful information for support.
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Setup and use
Can you tether with a travel eSIM? Plan limits and work use
Check hotspot support, shared-data limits, speed restrictions and the laptop’s background usage before relying on an eSIM for tethering.
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Before buying
Travel eSIM calls and SMS: keeping your usual number
Understand data-only plans, local numbers, app calls and messages to your home SIM before choosing how to stay reachable.
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Before buying
Travel eSIM vs. pocket Wi-Fi: choose for your group and devices
Compare individual use, group sharing, separate activities, charging and rental logistics before choosing a connection for your trip.
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Destination connectivity guides
Choose a destination to review arrival connectivity, local phone features, validity and practical preparation.
KOREA
South Korea
TAIWAN
Taiwan
THAILAND
Thailand
HAWAII
Hawaii
These guides explain how to evaluate a plan for your itinerary. They do not publish live prices, network tests or partner recommendations.
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