Activation and validity
Installing an eSIM is not one universal start rule.
Record the event that starts your exact package, the latest activation date and the expiry clock. Then decide when to install.
Keep four timing answers together
- Installation: when the provider tells you to add the profile.
- Start event: what actually begins the paid validity.
- Deadline: when an unused package must start or starts automatically.
- Expiry: how hours, days and timezone apply to your arrival and departure.
A 14-day inclusive calendar itinerary does not automatically fit 14 rolling 24-hour periods. Flight times and the actual activation event can change the final hours of coverage.
The documented clocks are different
Airalo: first use
The inspected Eurolink records state that validity begins on first use. A catalogue activation deadline of 365 days was observed for the fixed package; recheck the exact purchase terms. Exact expiry clocks remain unestablished. Unlimited fair-use guidance uses 24-hour periods from activation; do not substitute that daily rule for the package expiry rule.
Saily: arrival, enabled eSIM and roaming
The recorded guidance starts service on arrival in an included country with the eSIM and roaming enabled. An unused plan starts automatically after 180 days. Exact expiry and daily reset anchor still need confirmation. Record both the arrival event and the automatic-start deadline.
Holafly: first supported-network connection
The documented 14-day package uses 14 periods of 24 hours from its first connection to a supported network. The activation deadline and expiry timezone are unconfirmed. A nominal 14-day trip still needs its exact connection and departure times compared.
Before installing, save the exact instructions
Keep the plan name, public instruction URL, stated start event, deadline and expiry in your worksheet. Check the exact phone variant, software and carrier lock before relying on eSIM support. Do not put QR codes, activation codes or account credentials into a planning worksheet.
If a rule is unclear, ask the provider before installing. This guide records documentation; it does not establish that your phone has installed or activated successfully.
Use the iPhone departure checklistSources and evidence
Official documentation checked on 3 October 2026. The claims describe the published rules; they are not measurements of a working connection.
- Airalo Europe — 20 GB, 15 daysOfficial source. Checked 2026-10-03.
- Airalo Eurolink — Unlimited, 15 daysOfficial source. Checked 2026-10-03.
- Airalo Europe catalogueOfficial source. Checked 2026-10-03.
- Airalo Unlimited Data Plans — Fair Use PolicyOfficial source. Checked 2026-10-03.
- Airalo — Can I use tethering?Official source. Checked 2026-10-03.
- Saily Europe eSIM plansOfficial source. Checked 2026-10-03.
- Saily — What is the fair usage policy?Official source. Checked 2026-10-03.
- Holafly Europe eSIMOfficial source. Checked 2026-10-03.
- Holafly Trip Service Terms & ConditionsOfficial source. Checked 2026-10-03.
- Apple — Use eSIM while traveling internationally with your iPhoneOfficial source. Checked 2026-10-03.