In addition to Windows 8.1 and Windows 9 news, Windows Phone 8.1 will be one of Microsoft’s major announcements at Build 2014 this week, with the company expected to unveil the new features of the upcoming smartphone operating system update and launch plans. ZDNet says that Windows Phone 8.1 may have been already released to manufacturing, with Nokia expected to unveil this week a new Lumia handset running the new OS. However, it’s not exactly clear whether Nokia will announce a new smartphone on Tuesday, as the company could focus on either software and service, or unveil a wearable device during its Lumia media event. The publication has also listed some of the leaked features of Windows Phone 8.1, saying