Very rare, mostly affects specific VPN protocols over cellular.

Fix: Change your VPN's MTU to 1280 (from the default 1500). Consult your VPN app's advanced settings. If you don't use a VPN, this doesn't affect you.

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.