Got around to activating my iPhone 17 Pro today. Loving it so far (coming from a 13 Pro). However, the setup did not go as planned 
The new phone set up easily, got everything from my iCloud backup, transferred the eSim to my new phone, etc. Standard new phone stuff. I then went to prep my old phone for trade-in my turning off 'Find My' and deleting it from my iCloud account. Should have worked great, except... i forgot that when you restore an iCloud backup on a new device, the old device name transfers to the new device. So I see a device in my list that says 'iPhone 13Pro' and delete it. A couple minutes later, my new iPhone loses its cellular connection, then reboots. After some time, it goes to the initial setup screen. What?! Turns out, I deleted and reset my new phone.
Eventually, I realize my mistake and simply go thru the initial setup again. Unfortunately, I can no longer transfer my eSim since it already transferred once. Can't do it via the T-Mobile app either. So using my wife's phone, I call and get someone who was able to take care of it (after a long search of finding my account PIN
). Wait time was supposed to be an hour, but ended up getting settled in about a half hour. My new phone is up and running. Lesson learned. My 13 Pro was rock solid for so long, so it had been awhile since I went through this process. All's well that ends well I guess.
The new phone set up easily, got everything from my iCloud backup, transferred the eSim to my new phone, etc. Standard new phone stuff. I then went to prep my old phone for trade-in my turning off 'Find My' and deleting it from my iCloud account. Should have worked great, except... i forgot that when you restore an iCloud backup on a new device, the old device name transfers to the new device. So I see a device in my list that says 'iPhone 13Pro' and delete it. A couple minutes later, my new iPhone loses its cellular connection, then reboots. After some time, it goes to the initial setup screen. What?! Turns out, I deleted and reset my new phone.Eventually, I realize my mistake and simply go thru the initial setup again. Unfortunately, I can no longer transfer my eSim since it already transferred once. Can't do it via the T-Mobile app either. So using my wife's phone, I call and get someone who was able to take care of it (after a long search of finding my account PIN
). Wait time was supposed to be an hour, but ended up getting settled in about a half hour. My new phone is up and running. Lesson learned. My 13 Pro was rock solid for so long, so it had been awhile since I went through this process. All's well that ends well I guess.
