MacRumors reports that Apple has seeded the first beta of iOS 9.1 to developers

iOS 9.1 includes features for the iPad Pro, adding support for accessories like the Smart Keyboard and the Apple Pencil, both of which were designed for the larger-screened tablet. iOS 9.1 also offers support for Unicode 8, introducing a selection of new emoji like taco, burrito, unicorn face, hot dog, popcorn, turkey, cheese wedge, and more. In the Settings app, users have found a new Siri setting that lets you give voice examples for the "Hey Siri" feature that can be activated whenever the iPhone is connected to power. With the new iPhone 6s and 6s Plus, this will be essential because "Hey Siri" activation can be used even when an iPhone is not plugged in.

  Apple Releases First Public Beta of iOS 9.1