C Spire has simultaneously announced and started selling the HTC One today for $199 on-contract. The Mississippi-based carrier is the eighth-place wireless company in the US, but has still managed to start offering the HTC One before Verizon.
There's nothing unexpected about the HTC One on C-Spire. It's the same phone from other carriers, but it looks like the 32GB silver version is the only option. C Spire has a smallish 4G LTE footprint mostly in Mississippi, Florida, the southern Midwest, and parts of Georgia.
So maybe you don't want to wait for Big Red to get around to taking your money. Plans are cheaper on C Spire anyway, as long as the coverage works for you.