到底几时推送开发者预览版，官方消息！四月上旬，这个应该很稳吧

Sounds Great! When Can I Get It? And on which phones?
Windows Phone 8.1 will start rolling out to existing Windows Phone 8 users and will come pre-installed on new phones, including the Lumia 630 and 635 and Lumia 930announced by Nokia today, in the coming months. If you want to try out Windows Phone 8.1 and you are a registered developer, you can update your phone as part of the Developer Preview Program in the first part of April.