I don’t really understand what eSIM is. Does it act _just like_ a SIM card, but is software rather than a physical card? Does it modify how the phone acts on the network? For instance, if I put a Canadian SIM in my phone, I’ll probably be roaming. I’d have a local (eg: Verizon, AT&T, etc.) mobile ISP IP range, but be roaming from the provider perspective? Or, would I show up as coming from the Canadian mobile ISP’s network?
An eSIM is just a SIM but pre-embedded in the phone so the carrier can't provision a key inside a new SIM and then send it to you, they have to interactively and remotely setup their trust in a key in your non removable SIM.
There's not really any advantage AFA networks, etc, but it may be harder to GEO-restrict a software process than where you are willing to mail a new physical SIM, and of course it will be possible to support a lot more eSIM profiles simultaneously without the physical issues of trying to add bays for traditional SIMs that should be physically distinct if provisioned by different carriers.
