Technology
How eSIM technology works
A practical, step-oriented look at digital SIM profiles—what is stored on your device, how activation works, and how travellers manage multi-leg trips.
Your order
Choose your travel plan
Pick a data plan for your destination. Your QR code arrives by email within minutes.
Introduction
eSIM replaces a removable card with a secure module that downloads carrier credentials. Travel providers issue data plans as installable profiles you manage in settings.
The tutorials below walk through QR install, storage limits, APN and roaming toggles, plus security compared to physical SIMs.
Topic guide
Step-by-step topics
Follow these links for installs, roaming settings, and itinerary planning.
How to install a travel eSIM from a QR code
Step-by-step for iOS and Android with screenshots described in text.
Read articleeSIM profiles and storage: how many can you keep?
OEM limits, deleting old trips, and naming profiles for clarity.
Read articleSwitching eSIM profiles while travelling
When to toggle lines at borders and how to avoid billable roaming on the wrong SIM.
Read articleAPN and data roaming settings for travel eSIM
Why toggles matter abroad, MVNO quirks, and quick sanity checks.
Read articleeSIM security compared to a physical SIM
Theft resistance, remote wipe scenarios, and QR handling hygiene.
Read articlePlanning a multi-destination eSIM itinerary
Order of installs, validity windows, and backup connectivity ideas.
Read articleQuestions
How eSIM works FAQ
01Is eSIM secure?
Profiles are provisioned through your device’s secure element; treat QR delivery like any sensitive onboarding link.
02Can I reuse a profile on a new phone?
Travel plans are often one-time installs; check your order for reassignment rules before wiping or replacing hardware.
03Do I need roaming on for eSIM data?
Some networks require data roaming enabled for the eSIM line while abroad—this is separate from your home SIM’s roaming toggle.
Device check
Is your phone eSIM-ready?
Verify iPhone, Samsung, Pixel, and hundreds more before you buy a plan.
Check compatibilityNext step
Find a plan for your trip
Prepaid data in 195+ destinations — install before you fly.
Browse all plans