The OpenSim journal

Setup and support

Compatibility, installation, roaming settings and troubleshooting before and during a trip.

Should Data Roaming Be On or Off for an eSIM?

Learn when data roaming should be on or off for a travel eSIM, how to avoid home SIM roaming charges, and what settings to check after arrival.

18 Aug 2026Read story

The latest

Setup and support

Why Is My eSIM Not Working Abroad? What to Check First

18 Aug 2026

Phone open to eSIM settings beside a passport and travel adapter

Setup and support

Does my phone support eSIM? Check before you buy

12 Aug 2026

More setup and support

Traveler checking eSIM settings beside a passport, boarding pass and charger before departure

Setup and support

When should you install an eSIM before travel?

Learn when to install an eSIM before travel, when validity starts, how to activate it abroad, and which phone settings to change after landing overseas.

24 Jul 2026