iMessage is bound to your Apple ID and the phone numbers you've registered under it. If your home carrier's line loses signal or Wi-Fi calling is off, iMessage won't reach you via that number — Openline can't help because it's a separate line.

Fixes

  • Enable Wi-Fi calling on your home line before travelling.
  • In Settings → Messages → Send & Receive, verify your Apple ID email is listed too — iMessage can arrive there even if the phone number is unreachable.
  • Confirm your home number is still on the "You can be reached at" list.

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.