In tandem with the GM releases of iOS 9, watchOS 2, and OS X El Capitan on Wednesday, Apple also issued the first-ever beta of iOS 9.1.
The code is listed as build 13B5110e, and available only to registered members of the Apple Developer Program. The company warns that once installed, a device can't be reverted to an earlier version of iOS.
So far the exact contents of the beta are unknown, beyond a new range of emojis spotted by The Next Web. It will presumably address any outstanding bugs in the final version of 9.0, and as a major point release may also make various feature and interface tweaks.
Some of the new emojis include a crab, lion, taco, burrito, unicorn, racecar, and satellite, as well as medals and prayer beads.
iOS 9 is scheduled to reach the public on Sept. 16, nine days before the arrival of the iPhone 6s and 6s Plus. The operating system should also come preloaded on the iPad mini 4 and 12.9-inch iPad Pro.
Core iOS 9 features will include things like context-sensitive search and Siri functions, transit directions in Maps, and split-screen multitasking on iPads.