What is an eSIM:
eSIM is a digital SIM that is pre-installed in your smartphone. It allows you to activate an additional cellular plan on your phone with a simple download from carriers.
How you receive it:
You will receive it instantly after purchase.
Simply scan the QR code you received at purchase to start download and install on your phone right away.
Before purchase, please check on : Are my devices compatible with eSIM?
Activate it now or later? : Activate it first and use it later?
Step by step guide : How to activate an eSIM.