Microsoft introduces personal digital assistant Cortana for Windows Phone 8.1

SAN FRANCISCO, USA: Microsoft unveiled Windows Phone 8.1 and introduced Cortana, the personal digital assistant with a persona inspired by a much-loved "Halo" character.

Powered by Bing, Cortana gets to know you and gets better over time by asking questions based on your behavior and checking in with you before she assumes you're interested in something. She detects and monitors the stuff you care about, looks out for you throughout the day, and helps filter out the noise so you can focus on what matters to you.

Other new features that make Windows Phone 8.1 smartphones even more personal include Action Center, which complements Live Tiles by showing new activities and notifications at a glance; and Senses, a suite of features that takes the work out of managing data use, storage space and battery life.

Windows Phone 8.1 also makes it easier for IT professionals to manage devices and for professionals to connect to essential business apps and services with features such as simplified device enrollment, a built-in mobile device management client, S/MIME for encrypted mail and VPN support.

Windows Phone 8.1 will start rolling out to current Windows Phone 8 users over the coming months. It will also come pre-installed on new phones starting this month. Cortana will launch shortly in the U.S. as a beta, in the U.K. and China in the second half of 2014, and in other countries in 2015.