yes, if suddenly they added support for t-mobile and sprint. but it could also be something like upgrading / changing how their point-of-sale systems work to give an improved customer experience. that would make a lot of sense for a store anniversary, for example
Apple spent a lot of time over 10 years optimizing their POS system. Notice the cashier counters are gone?
It's doubtful they're going to change all of that for a new carrier, and they certainly didn't do it for Verizon.