alt Hacker NewsSame here, KPN, NL. You have to install the KPN app on the new phone and log in. Then you request an eSIM on the new phone. You get an SMS auth code on the old phone. You fill the auth code on the new phone. Then you have to remove the eSIM from the old phone (with the new one not provisioned yet). Then confirm on the new phone and cross your fingers that provisioning works. Presumably (according to the docs) when it fails, you can reprovision the old phone again.
The process made me so anxious the last few times, that I went to the carrier shop and asked for a nano SIM. Now life is bliss again.
It seems that eSIM is primarily an advantage when you need to get a new SIM, but other than that I don't really see much of an advantage for me as a customer.
I had to _call_ my German provider to get a new eSIM.
Meanwhile, my carrier in Japan not only migrates eSIMs between phones with no issues; it even offered to migrate my wife's physical SIM to an eSIM when setting up a new phone; and it worked flawlessly.
The way my original eSIM here was provisioned was also surprising to me, in a "I didn't even know this is possible" way.
When signing up for a contract, I just put in my eSIM EID, and then a couple of hours later an eSIM was _pushed to my phone by the carrier_; without me having to do anything (other than confirming that I do want to install it). Lots of customer-facing telecom infra here is pretty bad; but the eSIM experience was as good as it gets.