don't worry about it. I done it last year and it was painless. my provider did not allow e-sim transfer but I scanned the QR code they gave me for the new phone and it worked flawlessly. I'm with Smarty this year and I just need to do a sim swap in the app for a new device e-sim and were off...No wonder I’ve just spent an hour + live chat trying to update my iPhone 11 to eSIM in preparation for my Air on Friday. It’s all sorted now but I must admit I’m a bit nervous about trying to set up my new phone using phone to phone transfer now 😟