http://wccftech.com/google-esim-manager-app/

Google Pixel 2 and Pixel XL smartphones come with support for Embedded SIM cards aka eSIM. However, not much has been spoken about this feature on the phone. Here’s what you need to know about the eSIM and Google’s newly listed eSIM Manager app on the Play Store.

For all those who don’t know, eSIM is a SIM card integrated into the smartphone. It comes in the form of an embedded SIM chip that is not removable. It is also known as eUICC (embedded Universal Circuit Card). The information stored on this chip is entirely rewritable, which means that a user has the freedom to change the carrier whenever he wants, just by placing a simple phone call. It saves the users from getting a new SIM card when they change the carrier, the whole purpose of an eSIM is to promote mobility of networks. Absolutely no physical swapping involved here.