iOS 9.3 is coming in the Spring and will introduce Night Shift as well as a number of other new features.
Cellular-Capable Retina iPad Mini Models Begin Trickling Into U.S. Apple Retail Stores
Model selection is currently very limited and many stores have yet to show any available cellular models, but availability should improve over time as Apple delivers more stock to its stores.
While Apple retail stores in several other countries did have stocks of the cellular-capable Retina iPad mini at launch yesterday, the company's U.S. stores did not have any available. Online orders for the Retina iPad mini through Apple's U.S. store launched with 1-3 day shipping estimates on 16 and 32 GB Wi-Fi models, with larger-capacity Wi-Fi and all cellular models showing 5-10 day shipping. A number of customers who placed orders for Wi-Fi models have already seen their orders shipping directly from China, with delivery scheduled for early next week.