I have just updated my phone for the first time in so many years it feels like Christmas 
I could barely do anything with my dragging iphone6 but it is still vaguely usable and connected to an outgrown contract with O2.
I am looking for a new provider for airtime/calls. I will need an e sim as my new phone is the 15 pro.
Do I just call or go online to a new provider (EE for example)? I am not sure how to proceed, sim wise. I do not wish to stay with O2 at all, so will only be contacting them to end my plan when I am set up on the new phone.
Hope someone can help!