Two common culprits: background app refresh and automatic photo/video backup. On a travel plan both can burn gigabytes overnight without you touching the phone.

Quick audit

  • iPhone: Settings → Cellular → scroll down to see per-app data usage on the current line. Reset counters before travel to make this useful.
  • Android: Settings → Network & internet → SIMs → Openline → App data usage.
  • Turn off cellular data for photo apps, cloud backups, and streaming services during the trip.
  • Turn off background app refresh entirely if the plan is small.

If your usage still looks unreasonable relative to what you actually did, contact us with the ICCID and rough time window — we can pull partner-level records.

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.