Enterprise networks routinely block eSIM provisioning traffic as part of their security posture. This isn't an Openline problem — it's a corporate IT policy.

Why corporate Wi-Fi blocks eSIM installs

  • MDM protection — IT teams block third-party eSIMs so employees can't move company traffic off the corporate network.
  • Zero Trust proxies (Zscaler, Netskope, Cato) inspect all HTTPS and often reject SM-DP+ handshakes that don't match a known whitelist.
  • Split-tunnel VPN rules that force all traffic through the corporate gateway.

Workarounds

  1. Use mobile data on your existing primary line to install (fastest, always works).
  2. Tether from your personal phone if the work phone can't disable enterprise Wi-Fi.
  3. Install at home tonight on your own broadband — the eSIM will sit dormant until you activate it later.
  4. Ask IT to whitelist openline.com, api.openline.com, and rsp.openline.com (the SM-DP+ host).

After install: the app still won't sign in on corporate Wi-Fi

That's a separate issue — see Openline app can't connect on a corporate Wi-Fi. Once the eSIM is installed, you can manage everything from a browser at openline.com, which usually works on corporate Wi-Fi even when the native app doesn't.

Every Openline plan is delivered as a purchase code (format OL-4F7X-9K2Q-A3M8). You can redeem it in three ways: (1) inside the Openline app, (2) signed into your account at openline.com, or (3) anonymously at openline.com/start with just the code — no account needed.

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.