If you are on vz iphone 14 is enough because it supports A & B block on N77. Att iphone 15 is needed to support n77 & DOD and the rest of att CA, I believe TMO will also be ok with a 15, as they also have lots of CA. I have the 16 & 16 pro max, the AI and camera button to me is not worth it. I can care less.