I’m sure a lot of people in the US are anticipating the rollout of KitKat on their smartphones. Unlike iOS, the Android team releases OS updates by batch. Not all devices can get the update at once you have to wait for your mobile carrier to make the announcement. It’s frustrating, I know.
As for US Cellular subscribers, you can rejoice that your Samsung Galaxy S4 will soon get a taste if KitKat (Android 4.4). Nothing has been officially announced but a leaked document tells us. February 19 is the magic date but the release will be staggered and full release might stretch for 10 days.