Does Openline block any ports

Openline doesn't block outgoing ports by default. Some partner networks may block SMTP (25), NetBIOS, or SIP as anti-abuse measures. Contact support if you need a specific port confirmed for your use case.

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.