iOS 9.3 is coming in the Spring and will introduce Night Shift as well as a number of other new features.
Retina iPad Mini Shipping Times Lengthening at Major U.S. Carriers Amid Supply Constraints
Small amounts of stock of the cellular-capable models of the device began trickling into Apple's U.S. retail stores one day after the device's surprise launch last week, with Apple offering a Personal Pickup option for online orders. However, overall production of the device has been heavily constrained for the time being due to suggested display production issues, with shipments of the tablet likely to double in Q1 2014 as shortages ease.
First announced at Apple's iPad-centric October event, the second-generation iPad mini features a high resolution 2048x1536 display, with 326 pixels per inch, and a 64-bit A7 chip with the M7 motion co-processor. Those interested in purchasing the device can also check out an unofficial web tracker for checking the availability of Retina iPad mini models at Apple's U.S. retail locations. The tracker continues to show low in-store availability, with Sprint and low-capacity Wi-Fi models seeing the best supplies.