You can activate your eSIM whenever you want, because we don't work with expiration dates. Your eSIM is valid forever.
We recommend activating it as soon as you receive it, so you’re ready for your trip. Make sure your phone uses your local SIM while you’re still in your own country, then switch to DennisMobile when you arrive at your destination. To activate the eSIM, you need an internet connection (for example, via WiFi).