i don’t agree that it keeps users locked in. convenience wise it should be alot easier with e-SIM, technically you should just be able to open up an app and install a new e-SIM and voila your on a new provider.
As long as the phone maker and the phone service company play nice. The whole point of physical sims is. “you break your phone screen and phone? You can literally in the minute borrow your buddy’s phone, slap your sim in it”.
Why would it matter? For example here in Finland we have this thing called The Mobile ID. Which is commercial high security identification method, that works on the SIM. It’s user interface is the phone, but the actually crypto and logging works on the SIM. Just as with PIN number, the phone is just keypad to tell the SIM the security code to unlock it and operate. Not only does it work on SIM, due to security it is tied to the SIM. Each ID is a cryptographic key living physically in the SIM. never to leave it. public-private key exchange between the authentication server and SIM. on first boot/activation, SIM generates in-situ the private key, sends the public key to phone company, normal registrations hand shakes. Only thing anyone else has is the publickey. they private key lives it’s live in the SIM and just on getting signatory request and then correct unlock PIN signs the request and sends it back.
Which again means in the “oh my phone broke” situation means I haven’t lost my mobile ID. Just yank the SIM out of the husk of the broken flagship expensive smart phone and slap it into the cheapest 30 euro “I make calls and send text” budget phone. Still works just as well. Any phone you find (that isn’t SIM locked) will work, since as said the ID is the SIM, the phone is just keypad interface.
Also physical external sim allows physical update of the crypto processor. with eSim, if there is hardware fault or vulnerability found with the eSim, you are toast. With physical sim? So sorry customer, there has been vulnerability wound with the Sim crypto. Do you come to visit nearest operator store to get your new sim for your phone or do you want it sent by mail. Specially on say long lasting equipment… It is a very good thing there is a physically exchangeable cryptographic component. Rest of the equipment isn’t toast, just because someone cracked the SIM crypto.