In the UK for the networks that support eSim, to switch provider you only need to send 2 SMS's, the eSim will then be downloaded to your phone. After a few hours it's ready to go. You keep the same phone number (if you want).
This article from uSwich explains the advantages better than the article:
This article from uSwich explains the advantages better than the article:
https://www.uswitch.com/mobiles/guides/what-are-esims-what-d...