Yes, you can. But, before purchasing in advance, note the following:

• Your plan will only activate when your device connects to a network in a location covered by the plan. This applies to all plan types - Cruise, World, Regional, and country-specific plans - regardless of when the eSIM was downloaded or installed.
• If you purchase a plan that covers your current location, downloading and installing the eSIM will activate it as soon as it connected to a compatible cellular/mobile network. If your plan activates before you expected it to, please contact GigSky Customer Support at help@gigsky.com.
• Exception: Free Trial plans activate immediately upon download and install, not on network latch.

If you have any further questions, please contact GigSky Customer Support at help@gigsky.com.