How does eSIM roaming actually work at the technical level

Your eSIM profile contains authentication credentials for the "home" network (Openline's partner). When you land abroad, the local partner network authenticates you against Openline's HLR (Home Location Register). Traffic then routes via Openline's core network.

Further reading

Still stuck?

Reach Openline support 24/7 through any of these channels:

When you write in, include your purchase code (the OL-… code we emailed you) and, if the eSIM is already installed, its ICCID (Settings → Cellular → tap the Openline line). That's enough for us to find your plan and diagnose without back-and-forth.