Hey everyone! i was in best buy and found the MSRP of the iPhone 11 was $699 as to be expected for full price for verizon, AT&T, and T Mobile, but for some reason the sprint one was $599. Are phones carrier locked? It's been a while since i bought a new phone, was wondering if i could just buy the sprint one with cash for $599 and put my AT&T sim in it. Thanks!