Purchasing a New Phone
The no carrier option is no longer on the site how do I buy a phone with my carrier not being an option?
Check here: iPhone - Buying iPhone - Apple
Scroll to -> Will my new iPhone be unlocked?
Every iPhone you buy from us online or in an Apple Store is unlocked, with the exception of a few carrier financing options. With an unlocked iPhone, you’re free to go with the carrier of your choice.