Worldcitisim · Instant travel eSIM
Hop Cities,
Not SIM Cards.
Get online in minutes with our hassle-free eSIM. No shipping, no swapping, just scan, activate, and connect.
Coverage
193 countries
One eSIM per trip. No carrier swaps.
Live and in use
24/7 activations
Scan, connect, go — in under a minute.
Guarantee
100% money-back
If your eSIM isn't activated, we refund in full.
Top Picks for Travelers
View All →Japan
Top eSIM traveler pick
United States
Highest inbound + outbound volume
Thailand
SEA's #1 eSIM destination
United Kingdom
Business + tourism hub
China
VPN-friendly eSIM for mainland travel
Italy
#1 European leisure
Spain
Year-round traveler favourite
France
Olympics tail + Eurostar
Mexico
Beach + business volume
Europe+
One eSIM for the whole trip
How travelers use us
From my journey to yours
Hi, I’m Isabella, the founder of Worldcitisim. I started this service to make travel easier and stress free, because I know how important it is to stay connected abroad. If you ever run into a question or need help, I’m just a message away.
— Isabella Luongo, Founder & CEO
Global Coverage
Wherever you go, we’ve got you covered — 190+ countries and counting.
Learn About Our Services and eSIMs
All FAQs →What is an eSIM?
A digital SIM built into your phone. Install via QR code — no physical card, no carrier visit.
Will my phone work with an eSIM?
Almost all phones since 2022 (iPhone XS+, Pixel 3+, most Samsung since Galaxy S20). Check our compatibility page to be sure.
When does the eSIM activate?
On first tower contact at your destination. Pick your dates based on travel, not purchase.
What if I don't use it?
100% money-back guarantee if you never activate. Full refund (minus banking fees).