To know when you can install e-sim you must be aware of the activation policy. A lot of eSIMs will only activate automatically at the destination once they connect to a supported network. Or there are eSIMs that will activate instantly as soon as they are installed, regardless of the location.
How can I know when my eSIM will activate?
You must check your eSIM's activation policy. Before purchase:
Search for the country you wish to buy an eSIM for
Select the eSIM that you like
Check the important Information
Click more to find the Activation Policy
After purchase:
Go to My eSIMs> eSIM> Additional Information> Activation Policy
The activation policy will be either as follows
“The subscription starts when the eSIM connects to any supported network."
This means that you can install the eSIM before traveling without activating it. Once you arrive at the destination you can connect by turning on your eSIM line as long as the setup has been completed as on your eSIM guide installation page.
"The subscription starts at the installation":
This means that your eSIM will activate instantly once installed, and hence, the validity period will start to run although you are not yet at the destination.