Season 25 of the musical competition is gearing up to be the biggest one yet, and for the first time ever -- there’s a coaching duo!

Now, THIS is a duo we were never expecting.

Microsoft is back to selling smartphones for the first time since it abandoned its mobile business more than four years ago. The company began taking orders Wednesday for the Surface Duo, a new dual-screen Android device that costs $1,399 and begins shipping in September. Microsoft is pitching the Duo as a more useful tool than a conventional smartphone, since it enables users to multitask with two separate apps or web pages at a time. Adding a mobile device to its Surface line of computers is a reversal for Microsoft after its short-lived ownership of smartphone-maker Nokia and its difficulties in transitioning its Windows operating system to the mobile era. Apple and Google's Android long ago cornered the market on phone operating systems, but Microsoft's rare partnership with Google means Duo comes with a suite of Android apps.