With the exception of a few data plans, the majority of data plans will only begin counting usage once customers make their first connection to the local network. This is shown as “Validity starts: First connection” on the checkout page — for example the France eSIM.
For “Asia-Pacific 6GB 8Days” and “Global138 6GB 15Days”, the checkout shows “Validity starts: First installation”, which means the 8 or 15 days start counting right after installation and activation on your device. Please activate before you fly, over a Wi-Fi connection.
To activate the “Asia-Pacific 6GB 8Days” and “Global138 6GB 15Days” plans, note the billing period starts immediately after installation and activation on your device — activate the plan before connecting to a WiFi network abroad to ensure the full 8 or 15 days are available for usage.