Emil Protalinski, writing for The Next Web:
At its Build 2014 conference today, Microsoft unveiled Windows Phone 8.1. Among the new features is a personal digital assistant named Cortana, a new Action Center, as well as support for customizable lock screens and backgrounds. Windows Phone 8.1 will ship on devices in “very late April or early May.”
Cortana, Microsoft’s answer to Google Now and Apple’s Siri, completely replaces the search function on Windows Phone, which makes sense since she is powered by Bing. Launching her takes you straight to a list of personal suggestions based on how you use your device.