Scenario.
I am line 1. Using Line #3's upgrade.
Order on Apple.com
Apple ships iPhone with pre-installed nano SIM.
SIM will only activate on Line#3's phone number.
Need a new nano SIM for Line #1
Will the carriers (or Apple) have spare nano SIMs lying around on Day 1?
I am line 1. Using Line #3's upgrade.
Order on Apple.com
Apple ships iPhone with pre-installed nano SIM.
SIM will only activate on Line#3's phone number.
Need a new nano SIM for Line #1
Will the carriers (or Apple) have spare nano SIMs lying around on Day 1?