Not too long ago, I replaced a Verizon iPhone 5 at the Genius Bar, and when I tried to set up the replacement, it asked me which carrier I wanted to "lock" the phone into, saying I could never change it (see attached). I had options of Verizon, Sprint, and several regional carriers. Then today, I replaced a Sprint iPhone 5, again with it saying I had to choose a carrier and lock it to that carrier. However this time, my options were Sprint first and then Verizon (as in the picture) instead of Verizon then Sprint, and I'm pretty sure there were fewer regional carriers. This seems to suggest that I couldn't *actually* choose Verizon and get away with it, but I'm curious. Anyone know for sure? Thanks.