iPhone limits total active eSIMs to varying counts by model (usually 2 active). Adding a new one may prompt you to deactivate an existing one. Just re-enable it under Settings → Cellular.

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.